- anonymous

how do you do fractions?

- chestercat

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- OakTree

Meaning...

- anonymous

hey i am in 7th grade....and i never understood the simple steps!!

- OakTree

Wow...do you mean adding or subtracting or multiplying or dividing them?

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## More answers

- anonymous

all

- OakTree

O.K.

- OakTree

To add, you need to make common denominators (the bottom part) for both fractions

- OakTree

You following?

- anonymous

no .i am not stupid though.. can you show me a problem?

- 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

So you'd multiply 1/2 by 2/2, because to multiply fractions you just multiply the tops and bottoms, getting 2/4

- OakTree

And if you know simplifying fractions you know that 1/2 is the same as 2/4, so this always works

- 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

Good so far?

- anonymous

yup..

- OakTree

So then, to add them you can just add the tops...BUT KEEP THE BOTTOM THE SAME.

- OakTree

So 1+2=3, so your answer is 3/4

- anonymous

wow i am very stupid... well thanks

- OakTree

Then, for subtraction, it's the same thing, except you subtract the top numbers instead of adding them (duh!)

- OakTree

Good?

- anonymous

yes

- OakTree

And then I showed you multiplication already (when you get common denominators)

- OakTree

So that leaves division.

- 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

Which gives you 4/6, which you simplify into 2/3

- OakTree

You do know simplification of fractions, right?

- OakTree

Well, anyway, you just divide both the top and the bottom normally by a number they both go into.

- OakTree

Got all of that?

- OakTree

You there?

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