# adding and subtracting fractions

an explanation on how to add and subrtact fractions

- Created by: Missy
- Created on: 07-05-11 12:25

First 138 words of the document:

Adding and Subtracting Fractions

Adding:

1 5

22 +1 7

To make it easier, add the whole numbers and then the fractions

1 5

=2+1+ 2 + 7

1 5

=3+ 2 + 7

Then you need to find a common factor so that both the "bottom"

numbers are the same. 2 and 7 both go into 14 (2x7=14 & 7x2+14).

You need to do the same to the top as you did to the bottom (1

need to be multiplied by 7 and 5 by 2)

7 10

=3+ 14 + 14

Then you just need to add the 7 and 10 because the "bottom"

numbers are the same

17

=3+ 14

Because this fraction is "top heavy" it becomes

3

4 14

Subtracting:

1 1

43 -12

When subtracting mixed fractions convert them into "top heavy"

fractions to make it easier

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