Question

4/9 +1/3
7/8 + 1/16
9/10 + 1/15
11/12-7/12
4/5 -2/5
3/8-2/8
7/8-1/16
5/8-1/3
5/7-1/3

Answer 1

You'll need to get common denominators for these fractions.

Example:
4/9 +1/3

4/9 + 3/9 = 7/9

We'll be glad to check your answers.

Answer 2

ok but how do you find the common denominator?

Answer 3

Find the smallest number that the two denominators go into evenly.

Example:

7/8 + 1/16

16 is the common denominator because 16 is the smallest number divisible by 8 and 16.

16/8 = 2
Multiply the numerator by 2
7/8 = 14/16

Answer 4

This site also explains it.

http://aaaknow.com/fra66kx2.htm