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On February 25 2011 03:42 Arnstein wrote:
I've bought a book with tasks now. I'm only on the first chapter, so it's been pretty easy so far. However, I don't know how to solve this one:
7
12 * 2 (the *2 is in the middle, so you have to * both of them). I thought it was just to make it 14/24, but the answer sheet says it's
7
6
huh... if you have problems multiplying fractions, you might have quite a journey in front of you...
Edit slaps me and tells me to correct it at least instead of just complaining 
it is (7/12)*2 = (7*2)/12 ... upper part times upper part, down part times down part (how are those called in english anyway ?). In this case the "down part" of "2" is 1, as 2 = 2/1 ...
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On February 25 2011 04:15 Espelz wrote:Show nested quote +On February 25 2011 03:42 Arnstein wrote:
I've bought a book with tasks now. I'm only on the first chapter, so it's been pretty easy so far. However, I don't know how to solve this one:
7
12 * 2 (the *2 is in the middle, so you have to * both of them). I thought it was just to make it 14/24, but the answer sheet says it's
7
6 huh... if you have problems multiplying fractions, you might have quite a journey in front of you... Edit slaps me and tells me to correct it at least instead of just complaining it is (7/12)*2 = (7*2)/12 ... upper part times upper part, down part times down part (how are those called in english anyway ?). In this case the "down part" of "2" is 1, as 2 = 2/1 ...
Well, I'm a fast learner, but I haven't done anything math related like this in 6 years. I have known and done this long time ago, but need to refresh my memory 
Edit: And thanks for the answer, it was really bad to forget that 3 = 3/1, lol
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Just wanted to bump this. I've done all the exercises on Khan Academy now. I really hope they make new ones soon, as it's not really hard stuff there yet.
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United States10328 Posts
On July 17 2011 14:23 Arnstein wrote:
Just wanted to bump this. I've done all the exercises on Khan Academy now. I really hope they make new ones soon, as it's not really hard stuff there yet.
All the exercises? What does that entail?
Ok looks like... linear equations, quadratics, complex numbers, logs, conics, partial fractions, functions, and word problems? So Algebra I / Algebra II level stuff?
I think next you should do some functions (transformations, asymptotes, blah blah) and trigonometry before starting calculus?
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On July 17 2011 14:23 Arnstein wrote:
Just wanted to bump this. I've done all the exercises on Khan Academy now. I really hope they make new ones soon, as it's not really hard stuff there yet.
Why do you learn this? Is it because it's interesting to you? What appeals to you the most from your learning experience so far?
If you want to try something a little bit more complicated and theoretical (but also more fun, at least for some people), try Lay's Analysis: with an Introduction with Proof, which has most of the theories behind single variable calculus, and a little bit of topology...
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Ive found this guy's channel helpful for learning math.
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On July 17 2011 15:36 ]343[ wrote:Show nested quote +On July 17 2011 14:23 Arnstein wrote:
Just wanted to bump this. I've done all the exercises on Khan Academy now. I really hope they make new ones soon, as it's not really hard stuff there yet. All the exercises? What does that entail? Ok looks like... linear equations, quadratics, complex numbers, logs, conics, partial fractions, functions, and word problems? So Algebra I / Algebra II level stuff? I think next you should do some functions (transformations, asymptotes, blah blah) and trigonometry before starting calculus?
I've done some trigonometry as well on the exercises. Do you know where I can find more exercises on the internet? Then I can use the Khan videos to learn, and do the exercises on paper.
On July 17 2011 18:57 Sufficiency wrote:Show nested quote +On July 17 2011 14:23 Arnstein wrote:
Just wanted to bump this. I've done all the exercises on Khan Academy now. I really hope they make new ones soon, as it's not really hard stuff there yet. Why do you learn this? Is it because it's interesting to you? What appeals to you the most from your learning experience so far? If you want to try something a little bit more complicated and theoretical (but also more fun, at least for some people), try Lay's Analysis: with an Introduction with Proof, which has most of the theories behind single variable calculus, and a little bit of topology...
Because it's interesting, and also because I'm going to start studying to be an engineer. I can't play guitar anymore(or StarCraft) because of my back, so I want to become an engineer. I'll check out that Lay's-thingy.
Thanks for the link Saracen.
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The MIT OCW stuff is good at the basic levels but the notes get worse and worse as you go further into analysis-land. Don't expect to be able to read the more advanced Numerical notes unless you've already seen a numerical textbook once before or something.
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EPT
