Adding and Subtracting Fractions with Uncommon Denominators

Addition

100

1/3 + 1/6 

3/6 

1/3 X 2/2 = 2/6

1/6 X 1/1 = 1/6

2/6 + 1/6 = 3/6

200

3/6+6/12

12/12

3/6 X 2/2 = 6/12

6/12 X 1/1 = 6/12

6/12 + 6/12 = 1 or 12/12

300

2/8+1/6

10/24

Subtraction

100

8/6 - 1/3

6/6

200

2/4 - 1/8

3/8

300

1 1/2 - 1 1/3

1/6

Simplified

100

 simplify 8/7+1/3

what is 1 10/21

200

simplify 6/7+1/2

what is 1 5/14

300

simplify 6/6+1/2

what is 1 3/6