Adding and Subtracting Fractions

Front

3/5 + 3/10

Back

9/10

Front

1/3 + 1/9

Back

4/9

Front

5/12 + 1/3

Back

3/4

Front

1/6 + 1/12

Back

1/4

Front

2/3 + 2/9

Back

8/9

Front

7/18 + 1/3

Back

13/18

Front

1/2 + 9/20

Back

19/20

Front

1/8 + 11/16

Back

13/16

Front

3/20 + 3/4

Back

9/10

Front

What is the least common denominator for 1/3 and 3/4?

Back

12