anonymous
  • anonymous
how do you do fractions?
Mathematics
chestercat
  • chestercat
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OakTree
  • OakTree
Meaning...
anonymous
  • anonymous
hey i am in 7th grade....and i never understood the simple steps!!
OakTree
  • OakTree
Wow...do you mean adding or subtracting or multiplying or dividing them?

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anonymous
  • anonymous
all
OakTree
  • OakTree
O.K.
OakTree
  • OakTree
To add, you need to make common denominators (the bottom part) for both fractions
OakTree
  • OakTree
You following?
anonymous
  • anonymous
no .i am not stupid though.. can you show me a problem?
OakTree
  • OakTree
So, for 1/2 + 3/4, you need to get both to have a bottom of 4. That's a number that both 2 and 4 go into.
OakTree
  • OakTree
So you'd multiply 1/2 by 2/2, because to multiply fractions you just multiply the tops and bottoms, getting 2/4
OakTree
  • OakTree
And if you know simplifying fractions you know that 1/2 is the same as 2/4, so this always works
OakTree
  • OakTree
But you always need to multiply by 2/2 or 5/5 or whatever, because otherwise you're not multiplying by 1 (2/2 or 5/5 are both just 1)
OakTree
  • OakTree
Good so far?
anonymous
  • anonymous
yup..
OakTree
  • OakTree
So then, to add them you can just add the tops...BUT KEEP THE BOTTOM THE SAME.
OakTree
  • OakTree
So 1+2=3, so your answer is 3/4
anonymous
  • anonymous
wow i am very stupid... well thanks
OakTree
  • OakTree
Then, for subtraction, it's the same thing, except you subtract the top numbers instead of adding them (duh!)
OakTree
  • OakTree
Good?
anonymous
  • anonymous
yes
OakTree
  • OakTree
And then I showed you multiplication already (when you get common denominators)
OakTree
  • OakTree
So that leaves division.
OakTree
  • OakTree
You just reverse the second fraction and multiply them, so 1/2 divided by 3/4 would really just be 1/2 x 4/3
OakTree
  • OakTree
Which gives you 4/6, which you simplify into 2/3
OakTree
  • OakTree
You do know simplification of fractions, right?
OakTree
  • OakTree
Well, anyway, you just divide both the top and the bottom normally by a number they both go into.
OakTree
  • OakTree
Got all of that?
OakTree
  • OakTree
You there?

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