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  #26    
Old February 5th, 2011 (11:14 AM).
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How's it taught in the English system?

In Canada, math doesn't branch out into separate topics until grade 12 (last grade). We learn a combination of algebra, geometry, trig, etc. until grade 11 and then it branches to... I forget what it is here in Ontario now. When I was in HS it was Calculus, Discrete Algebra, and Data Management. I think they merged the Discrete course and the Calculus course now (wtf).
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  #27    
Old February 5th, 2011 (12:54 PM).
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    Quote:
    Originally Posted by DAWJ View Post
    Well In my high school you first learn Algebra in 9th Geometry 10th Trigonometry 11th and pre calc 12th. (or if your like me Algebra in 8th, Geometry in 9th, Trigonometry 10th, Pre calc 11th, and I think calc 12th.
    Ah, okay, that's a bit... odd. Is that ALL you learn in each grade?
    Quote:
    Originally Posted by Lightning View Post
    How's it taught in the English system?
    Throughout the year, we all learn different things. I'm only in year 10 (equivalent to... I THINK 9th grade) and yet I've already done trigonometry.
    I wouldn't be able to properly explain how it works, though, since it seems to change JUST for my year group.
    Quote:
    Originally Posted by Lightning View Post
    In Canada, math doesn't branch out into separate topics until grade 12 (last grade). We learn a combination of algebra, geometry, trig, etc. until grade 11 and then it branches to... I forget what it is here in Ontario now. When I was in HS it was Calculus, Discrete Algebra, and Data Management. I think they merged the Discrete course and the Calculus course now (wtf).
    Well, actually, thinking about it, that's quite similar to what we do. But I don't know if it splits off in Year 13 (last grade for us).
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      #28    
    Old February 5th, 2011 (3:17 PM).
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      math O.O

      I LOVE MATH :D

      May I join?

      Username: Pikagirl3
      Overall Education Level: 12th Grade in High School
      Mathematics Education Level: regular math, Algebra I and II, Geometry (although not that good at geomertry , Advanced Functions and Modeling, and Discrete Math.
      Do you think you can be asked for help in your level or lower?: Yuppers
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      Another Math Joke: (cause EVERYONE LOVES JOKES!)
      -What do you get if you divide the circumference of a jack-o-lantern by its diameter? PUMPKIN PI XD
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        #29    
      Old February 7th, 2011 (9:24 PM).
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      Quote:
      Originally Posted by I like Pokemon (...) View Post
      Also, can someone explain to me how maths is taught in USA? Because it's very different from the English system, it seems.
      Generally, 9th graders take Algebra I. In 10th grade, some schools elect Algebra 2, and others elect Geometry. 11th graders take the one not taken. In Texas, a course in Math modeling can be taken BEFORE Algebra 2 to satisfy the 4 credit requirement without taking math above Algebra 2. Otherwise, 12th Grade is most generally Pre-Calculus or Trigonometry. Pre-Calculus is more dominant. In the US, The College Board also has an AP program which allows schools to include Calculus AB, Calculus BC, and Statistics as classes. The state of Texas approves these AP courses for high school credit, allowing people to graduate with up to 7 math credits.

      In my case, I'll be brooming Multivar Calculus, Vector Calculus, Differential Equations, Analysis, Non-Euclid Geo, and Topology before graduating from High school ^__^ Hopefully. Of course, this means I had to concurrently enroll with an university because there doesn't seem to be any high school that offers anything above Calculus II or a second course relating to Statistics.

      Quote:
      Originally Posted by Lightning View Post
      In Canada, math doesn't branch out into separate topics until grade 12 (last grade). We learn a combination of algebra, geometry, trig, etc. until grade 11 and then it branches to... I forget what it is here in Ontario now. When I was in HS it was Calculus, Discrete Algebra, and Data Management. I think they merged the Discrete course and the Calculus course now (wtf).
      ;_; Ever since 8th grade ended, I've never been able to imagine a life without subjects split apart. Specialization and even choice was pretty good.
      Quote:
      Originally Posted by pikagirl3 View Post
      Another Math Joke: (cause EVERYONE LOVES JOKES!)
      -What do you get if you divide the circumference of a jack-o-lantern by its diameter? PUMPKIN PI XD
      That'd be a nice thing to tell during Halloween XD

      And wow, so many people are joining already ^__^ So glad there's a significant population with an interest in math.
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        #30    
      Old February 8th, 2011 (1:15 PM).
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      Even with AK47's explaination I still don't get how Mathematics is taught in the US. Etymologically, Precalculus means everything before Calculus, which would include 1st-grade education, like addition of single-digit numbers. Yet apparently people have somehow limited it to something between Algebra and Calculus, but adding the split of Algebra to Algebra I and Algebra II just confuses me even more.

      On topic now, I love Mathematics. That's why I am definitely going to join this group.


      Username: ShinyMeowth
      Overall Education Level: 9th grade
      Mathematics Education Level: No idea what course this would apply to, since I've been studying at home, but I have studied Calculus up to triple integration, in Cartesian, Cylindrical and Spherical coordinates, and am currently studying Probability.
      Do you think you can be asked for help in your level or lower?: Sure, always glad to help.
      I wish I were a _______ so I could lay tangent to your curves: Derivative.

      Anyway, Now that I have finished watching every Pokemon episode aired so far, 6 hours per day have been freed in my life. I plan to use these hours to study more, and I am planning to study, and finish number theory and group theory before I get to the 10th grade.

      Anyway, I would like to bring up a topic of conversation, what do you think of teachers teaching us incorrect rules that are to be removed or disproved later on? I personally have told my teacher off many times, but still she insists that negative numbers have no square root. My opinion is the same opinion I have about reproduction. Teachers should tell their students the truth, while leaving out unnecessary details. Teaching them something that is incorrect and even insisting on it when somebody refuses to take it? That is terrible teaching in my opinion.
        #31    
      Old February 8th, 2011 (1:38 PM).
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        Quote:
        Originally Posted by ShinyMeowth View Post
        Anyway, I would like to bring up a topic of conversation, what do you think of teachers teaching us incorrect rules that are to be removed or disproved later on? I personally have told my teacher off many times, but still she insists that negative numbers have no square root. My opinion is the same opinion I have about reproduction. Teachers should tell their students the truth, while leaving out unnecessary details. Teaching them something that is incorrect and even insisting on it when somebody refuses to take it? That is terrible teaching in my opinion.
        I agree with you on your method of choice, on how teachers teach you something that isn't true to begin with, or actually incorrect later on. Some people just take it, and then wonder how they got a question wrong when they completely did what they were taught? I think teachers should either go over their notes/lessons, or just tell the truth.
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          #32    
        Old February 9th, 2011 (9:50 AM).
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        I disagree with insisting on it--if someone disagrees with it, teachers should go with the flow and sort of explain ahead a little bit if anyone's interested before going back to the curriculum.

        In the case of negative fractions, I can see why they'd teach it that way. Quite often in the maths and sciences, they'll gloss over a lot of details and teach the general blanket rules before they start teaching the exceptions. I learnt that you couldn't take the root of a negative number and then a few years later (or later in the semester or the next year... I forget when I learnt square roots xD), we learnt about i and imaginary numbers. But for the most part, my experience is that a lot of people are only in math because their school requires it and for a LOT of people, tossing ~imaginary numbers~ into the mix just sounds silly and they can't grasp the material as easily so early on, or they just lose interest because "now it's getting ridiculous". :/ Sounds like you just have a bad teacher who thinks they have to follow the curriculum rigidly and with no wiggle room.

        (Relatedly, I know I learnt about imaginary numbers in 11th grade math but apparently it's not even in the high school curriculum in my province anymore and I think that is unacceptable, nevermind just coming back to it later. <_<)
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          #33    
        Old February 9th, 2011 (3:06 PM).
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          Quote:
          Originally Posted by AdvancedK47 View Post
          Generally, 9th graders take Algebra I. In 10th grade, some schools elect Algebra 2, and others elect Geometry. 11th graders take the one not taken. In Texas, a course in Math modeling can be taken BEFORE Algebra 2 to satisfy the 4 credit requirement without taking math above Algebra 2. Otherwise, 12th Grade is most generally Pre-Calculus or Trigonometry. Pre-Calculus is more dominant. In the US, The College Board also has an AP program which allows schools to include Calculus AB, Calculus BC, and Statistics as classes. The state of Texas approves these AP courses for high school credit, allowing people to graduate with up to 7 math credits.
          That... just sounds complicated.
          The English system has a lot less room for choice, but we tend to cover a good variety of non-specific branches of mathematics. And then it depends on what course you take in university.

          Quote:
          Originally Posted by AdvancedK47 View Post
          And wow, so many people are joining already ^__^ So glad there's a significant population with an interest in math.
          I completely agree with you there.
          Quote:
          Originally Posted by ShinyMeowth View Post
          Even with AK47's explaination I still don't get how Mathematics is taught in the US. Etymologically, Precalculus means everything before Calculus, which would include 1st-grade education, like addition of single-digit numbers. Yet apparently people have somehow limited it to something between Algebra and Calculus, but adding the split of Algebra to Algebra I and Algebra II just confuses me even more.
          I think "Pre-calc" is more specific to "the things you'll need to learn before proper calculus, ignoring basic things that you've probably learnt like addition."

          Quote:
          Originally Posted by ShinyMeowth View Post
          Anyway, I would like to bring up a topic of conversation, what do you think of teachers teaching us incorrect rules that are to be removed or disproved later on? Teaching them something that is incorrect and even insisting on it when somebody refuses to take it? That is terrible teaching in my opinion.
          Ah, yes, I definitely have an opinion on this.
          I always HATE it when my teacher says that something can't be done "you can't subtract a bigger number from a smaller number/you can't square root a negative number/etc." and then next year they contradict themselves.
          If I were a teacher, I would specifically mention this but I wouldn't go into much detail, instead telling the student "if you want to know more, you can research it or ask me after lesson, but you won't need to know for this module". This way, students who WANT to know this learn it, and those who don't need to know it now, won't.
          Quote:
          Originally Posted by Lightning View Post
          (Relatedly, I know I learnt about imaginary numbers in 11th grade math but apparently it's not even in the high school curriculum in my province anymore and I think that is unacceptable, nevermind just coming back to it later. <_<)
          I've used imaginary numbers so much in my spare time, I don't even remember if the curriculum in England teaches it or not XD.

          I have a question. I don't know how to do integrals yet, but I've seen that it can be used to find the volume of a sphere. Can this be done to find the area of a regular shape (something simple, like a triangle or a square) and more specifically, can it be used to find the area of a trapezium?
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            #34    
          Old February 9th, 2011 (7:33 PM).
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          Quote:
          Originally Posted by ShinyMeowth View Post
          Even with AK47's explaination I still don't get how Mathematics is taught in the US. Etymologically, Precalculus means everything before Calculus, which would include 1st-grade education, like addition of single-digit numbers. Yet apparently people have somehow limited it to something between Algebra and Calculus, but adding the split of Algebra to Algebra I and Algebra II just confuses me even more.
          Don't think of Pre-Calculus as a branch of mathematics or the set of all math down to first grade math before calculus >__> Algebra is split into Algebra I and II mostly because high school algebra is a deep subject and does require two years of proper study. Algebra II is also pretty expanded from the concepts of Algebra I, which was much more introductory to get the algebraic thinking straight.

          And Pre-calculus should be thought of as a superset to Algebra II. First semester it's just accelerated Algebra II with preparation for skills in calculus. Second semester gets more abstract and gives advanced trigonometry and other subjects like polar coordinates in preparation for common topics in Calculus. Obviously, trig is abused in calculus like a doll under a dog o_o And other skills are also learned to apply calculus in other ways later on.
          Quote:
          Username: ShinyMeowth
          Overall Education Level: 9th grade
          Mathematics Education Level: No idea what course this would apply to, since I've been studying at home, but I have studied Calculus up to triple integration, in Cartesian, Cylindrical and Spherical coordinates, and am currently studying Probability.
          Do you think you can be asked for help in your level or lower?: Sure, always glad to help.
          I wish I were a _______ so I could lay tangent to your curves: Derivative.
          Woah woah what?! XD You're kidding right?! Multivariable Calculus in the ninth grade?! Are you Asian? I think I'd understand if you're homeschooled and you've been emphasized mathematics. I'll say, I'm impressed.
          Quote:
          Anyway, Now that I have finished watching every Pokemon episode aired so far, 6 hours per day have been freed in my life. I plan to use these hours to study more, and I am planning to study, and finish number theory and group theory before I get to the 10th grade.
          Slow down, you're making me feel bad o__o
          Quote:
          Anyway, I would like to bring up a topic of conversation, what do you think of teachers teaching us incorrect rules that are to be removed or disproved later on? I personally have told my teacher off many times, but still she insists that negative numbers have no square root. My opinion is the same opinion I have about reproduction. Teachers should tell their students the truth, while leaving out unnecessary details. Teaching them something that is incorrect and even insisting on it when somebody refuses to take it? That is terrible teaching in my opinion.
          Giving the wrong information is bad. If you do wonder and ask, teachers should be obligated to explain a little bit. At the very least send you to the library to do your own research. The dilemma of the square root of a negative number wasn't introduced to me until later in Algebra. I did my own researching to clear the question, and I had to wait until second semester of Algebra II to be introduced to i. >__>

          Then again, I also still remember my 3rd grade teacher saying a number can't be subtracted something larger than itself >__> They're called negative numbers, people. I swear, I was bored in elementary school all the time.



          Such interesting stuff I'm noticing, that more and more people seem to be advanced in their math studies, yet there's also many that are just normal or behind. I do wonder if legislatures for education should consider 'raising the bar'. Maybe the standard should be that advanced math studies should begin in 7th grade. It doesn't require too much compression of pre-algebraic mathematics, since it's a simple 10 year to 8 year compression. And I am confident that people should be perfectly capable of understanding advanced mathematics at a young age. So let Algebra and Geometry be things of 7th and 8th grade, and we have ourselves Advanced Algebra, Pre-calculus/Trigonometry, Calculus I, and Calculus II before college. Would it be a good idea to have that be the norm?
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            #35    
          Old February 9th, 2011 (8:18 PM).
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          My province outright lowered the bar. :/ Lots of idiots in standard schooling here.

          (A lot of forum users are computer nerds who are more likely to be interested in math so you're gonna get a biased sample in this club. :P)
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            #36    
          Old February 10th, 2011 (4:57 AM).
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          Quote:
          Originally Posted by AdvancedK47 View Post
          Don't think of Pre-Calculus as a branch of mathematics or the set of all math down to first grade math before calculus >__> Algebra is split into Algebra I and II mostly because high school algebra is a deep subject and does require two years of proper study. Algebra II is also pretty expanded from the concepts of Algebra I, which was much more introductory to get the algebraic thinking straight.

          And Pre-calculus should be thought of as a superset to Algebra II. First semester it's just accelerated Algebra II with preparation for skills in calculus. Second semester gets more abstract and gives advanced trigonometry and other subjects like polar coordinates in preparation for common topics in Calculus. Obviously, trig is abused in calculus like a doll under a dog o_o And other skills are also learned to apply calculus in other ways later on.
          Yeah, I can see how most of that works now.
          Quote:
          Woah woah what?! XD You're kidding right?! Multivariable Calculus in the ninth grade?! Are you Asian? I think I'd understand if you're homeschooled and you've been emphasized mathematics. I'll say, I'm impressed.
          Slow down, you're making me feel bad o__o
          I have Asperger's. As a result, I have more advanced Mathematics skills than normal, but that is balanced out by my terrible Literature grades. I would love to be homeschooled, but unfortunately the Greek educational system is terrible, and there is no such thing here.
          Quote:
          Then again, I also still remember my 3rd grade teacher saying a number can't be subtracted something larger than itself >__> They're called negative numbers, people. I swear, I was bored in elementary school all the time.
          Wow, they refused to acknowledge negative numbers? That is like a billion times more ridiculous than ignoring imaginary ones.
          Quote:
          Such interesting stuff I'm noticing, that more and more people seem to be advanced in their math studies, yet there's also many that are just normal or behind. I do wonder if legislatures for education should consider 'raising the bar'. Maybe the standard should be that advanced math studies should begin in 7th grade. It doesn't require too much compression of pre-algebraic mathematics, since it's a simple 10 year to 8 year compression. And I am confident that people should be perfectly capable of understanding advanced mathematics at a young age. So let Algebra and Geometry be things of 7th and 8th grade, and we have ourselves Advanced Algebra, Pre-calculus/Trigonometry, Calculus I, and Calculus II before college. Would it be a good idea to have that be the norm?
          Actually, I completely disagree with that. Raising the bar, especially on obligatory lessons is bound to make people focused on other topics fall back and fail the grades. What should be done in my opinion, would be to allow students to unrestrictedly skip grades (No idea if that's done in the US already, but it certainly is not here), allow homeschooling globally, and finally, let people choose lesson paths before the 4th grade, and allow them to switch later on, effectively limiting the hours spent at school, without doing any harm to the amount of knowledge people actually get. I mean, seriously, I calculated that I've wasted about 8,500 hours in that dump since the first grade. And I've been taught what I could study myself in about 100 hours. Talk about a waste of time. Another thing that I believe could work, would be to completely scrap off the first 5 grades, and push everything you are taught in these to the 6th. You don't learn much there anyway, and most of what you do will be contradicted later on. I never paid any attention at elementary school, and I had no problem functioning in the 7th grade at all.
            #37    
          Old February 10th, 2011 (5:15 AM).
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          Mathematics Education Level: I study in Hong Kong so we have a different system. I might be the youngest here but I can beat year elevens :3 I've tried multivariate calculus and it wasn't that hard =]
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            #38    
          Old February 10th, 2011 (10:50 AM). Edited February 10th, 2011 by ShinyMeowth.
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          Quote:
          Originally Posted by Pokemon Trainer Touko View Post
          =:3 I've tried multivariate calculus and it wasn't that hard =]
          I'm only 12 ~~
          And now I can't boast at my school without feeling horrible anymore . Anyway, in the words of AK47, I'm impressed. Welcome to the Mathematics club, hope enjoy your stay :D
            #39    
          Old February 10th, 2011 (1:42 PM).
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            Quote:
            Originally Posted by AdvancedK47 View Post
            Woah woah what?! XD You're kidding right?! Multivariable Calculus in the ninth grade?! Are you Asian? I think I'd understand if you're homeschooled and you've been emphasized mathematics. I'll say, I'm impressed.
            Slow down, you're making me feel bad o__o
            The beautiful and dreadful thing about maths is that as long as you have a logical mind, EVERYTHING in math can be made easy. Honestly. The reason why you have those child prodigies who can do Uni level maths at the age of 5 is because they have a logical mind, and their parents allowed them to do that.
            I know for certain that everyone in this club, if they had been given the opportunity, would be like the prodigies I mentioned. That's the beauty of maths; if I want to, I can learn anything I want as early as I want, unless it develops on some other branches (like calculus and trig).
            The "dreadful" bit is that some ARE allowed to do higher level work much earlier than others who could, but aren't allowed. Take the example of ShinyMeowth and Pokemon Trainer Touko, they were allowed to do calculus and such at a young age, and we're feeling bad XD

            Quote:
            Originally Posted by AdvancedK47
            Such interesting stuff I'm noticing, that more and more people seem to be advanced in their math studies, yet there's also many that are just normal or behind. I do wonder if legislatures for education should consider 'raising the bar'. Maybe the standard should be that advanced math studies should begin in 7th grade. It doesn't require too much compression of pre-algebraic mathematics, since it's a simple 10 year to 8 year compression. And I am confident that people should be perfectly capable of understanding advanced mathematics at a young age. So let Algebra and Geometry be things of 7th and 8th grade, and we have ourselves Advanced Algebra, Pre-calculus/Trigonometry, Calculus I, and Calculus II before college. Would it be a good idea to have that be the norm?
            Here's the thing.
            Obviously, mathematics and literacy are INCREDIBLY important for getting jobs, correct? If you can't read/write or do arithmetic, then, well, you're screwed.
            But when you reach the age of, say, 14-15 at school, what you learn isn't really all that important for the average worker. Why do I need to learn to analyse a book, or learn quadratics? I don't.
            I think that all the really important things should really be pushed until Year 9 (which is the final year, in England, that all subjects are compulsory). After that, it should really be optional. Of course, others would disagree.
            Quote:
            Originally Posted by Pokemon Trainer Touko View Post
            I might be the youngest here but I can beat year elevens :3 I've tried multivariate calculus and it wasn't that hard =]
            Please don't smash me with super hard stuff- I'm only 12 ~~
            Mhm, like mentioned before, as long as you have someone that can explain every step and a logical mind, stuff like this can be taught to 12 year olds Unless you're going to tell me you learnt it when you were 8?
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              #40    
            Old February 10th, 2011 (2:04 PM).
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              Quote:
              Originally Posted by ShinyMeowth View Post
              (No idea if that's done in the US already, but it certainly is not here)
              Being in Florida, my school is going to start doing that due to too many students getting a very low education and low skills in both math and literature. It hasn't started yet, but the principal did announce that if it were to happen(I only know it will happen in my middle school), yet he also mentioned it might not happen due to the economy. If it were though, 6th graders could skip to 7th and so on....as of skipping by will, I don't know much of that stuff, I'm still in research and barely turned 14 years old.
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                #41    
              Old February 10th, 2011 (2:07 PM).
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              Overall Education Level: 3rd year (9th grade in american terms)
              Mathematics Education Level:I do the new irish project maths sylubus, more wordy and complex equations, its about the equalivent of 12th grade maths,I know alot of the equations such as the distance between 2 points [^1/2{(a1+a1)^2+
              (b1+b2)^2}] ,
              Do you think you can be asked for help in your level or lower?: Sure
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                #42    
              Old February 10th, 2011 (5:27 PM).
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                Originally Posted by NurseBarbra View Post
                Joining~
                Username: Nurse Barbra
                Overall Education Level: 3rd year (9th grade in american terms)
                Mathematics Education Level:I do the new irish project maths sylubus, more wordy and complex equations, its about the equalivent of 12th grade maths,I know alot of the equations such as the distance between 2 points [^1/2{(a1+a1)^2+(b1+b2)^2}] ,
                Do you think you can be asked for help in your level or lower?: Sure
                I wish I were a _______ so I could lay tangent to your curves: n Angle of 35* or more~
                Welcome and hope you enjoy...wait for the leader to put you in the member list, I'm sure she would.
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                  #43    
                Old February 17th, 2011 (6:32 PM).
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                I am not impressed with the lack of productivity in the recent week.

                Now to talk about why exactly you like math, or what you like about it and when did it get you so interested? Is there anything specific that had you hooked?
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                  #44    
                Old February 18th, 2011 (3:00 AM).
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                  Quote:
                  Originally Posted by AdvancedK47 View Post
                  I am not impressed with the lack of productivity in the recent week.

                  Now to talk about why exactly you like math, or what you like about it and when did it get you so interested? Is there anything specific that had you hooked?
                  Probably because we had no topic/no activity. Maybe we should set something like, a topic per week, or a random fact per, say, 5 days, or a quiz, or simply what you learn that week, or something like that.

                  Why exactly I like math? I don't really know why. It's just... fun, I guess. Like my lecturer said once, "When you get to prove the trigonometric equations, it felt fun, isn't it? Just like orgasm." The best part is when you get an answer to a question that's been bugging you for days.

                  Anything specific... I know someone is going to answer pi

                  Speaking of that, I'd really to learn more about the history behind constants like pi, e, etc. But the syllabus is just more centered around "How do you apply this to this" etc.

                  Anywayy.. Today entered the chapter derivative in graphing and application. The concavity part is still easy, but I have a feeling that the graph-sketching part is not going to be that simple.
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                    #45    
                  Old February 18th, 2011 (3:08 AM).
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                    yeaaahh mathssss.

                    Username: Ninja Caterpie; NC, En-say
                    Overall Education Level: Year 9
                    Mathematics Education Level (Or most recent/advanced math subject): eh idg this.
                    Do you think you can be asked for help in your level or lower? Yes. Possibly a bit higher, too.
                    Life = The Universe = Everything = 42/3 = 14.
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                      #46    
                    Old February 18th, 2011 (3:23 AM).
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                    Quote:
                    Originally Posted by AdvancedK47 View Post
                    Now to talk about why exactly you like math, or what you like about it and when did it get you so interested? Is there anything specific that had you hooked?
                    I like maths because I get to go home at math lessons~ The teacher said that I don't need to attend until I get the same grade as the rest of the class~ :3
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                      #47    
                    Old February 18th, 2011 (3:33 AM).
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                    ...well, I like maths,

                    but right now in year 9 I am having some trouble with motion problems.
                    can anyone help with this?

                    I don't want to put the question because I want to try learn it myself, but does anyone know what I mean by motion problems?
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                      #48    
                    Old February 18th, 2011 (4:48 AM).
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                      Quote:
                      Originally Posted by Impo View Post
                      ...well, I like maths,

                      but right now in year 9 I am having some trouble with motion problems.
                      can anyone help with this?

                      I don't want to put the question because I want to try learn it myself, but does anyone know what I mean by motion problems?
                      I can't imagine it. Maybe you can post the question, then we can give hints on how to solve it? Or try finding a similar question, maybe?
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                        #49    
                      Old February 18th, 2011 (4:58 AM).
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                      okay, here's an example;

                      A motor cyclist makes a trip of 500km. If he had increased his speed by 10km/h, he could have covered 600km in the same time. What was his original speed?
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                        #50    
                      Old February 18th, 2011 (5:43 AM). Edited February 18th, 2011 by smile!.
                      smile!'s Avatar
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                        Quote:
                        Originally Posted by Impo View Post
                        okay, here's an example;

                        A motor cyclist makes a trip of 500km. If he had increased his speed by 10km/h, he could have covered 600km in the same time. What was his original speed?
                        Some other members might have a different solution, but this would be what I did.

                        Hint:
                        Spoiler:
                        We know that the basic equation is S=D/T.

                        We want to find S. D is already given. T is unknown. You cannot assign any value to T because T is fixed. So we have 2 unknowns. Therefore; use simultaneous equation.

                        Answer:
                        Spoiler:
                        Equation 1... S=500/T
                        Equation 2... S+10=600/T (S+10 is because he increases the original S by 10)

                        So you get
                        1... TS = 500
                        2... T(S+10) = 600
                        ..... TS + 10T = 600

                        Then substitute (1) into (2)
                        500 + 10T = 600

                        Solve for T, we get 10T = 100
                        Hence T = 10

                        Now that we know the value of T, we can continue solving for S
                        1... TS = 500
                        10S = 500
                        S = 50 km/h

                        Voila!

                        To recheck, you can try calculating the value of D.

                        Original speed = 50km/h, T = 10h, so D = 500 km
                        If speed is increased by 10 = 60 km/h, T = 10h, so D = 600 km
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