Operations with Fractions

Adding

100

2/3 + 4/5

22/15

200

5/6 + 7/8

41/24

300

3/4 + 2/3

17/12

400

1 5/7 + 2 1/4

3 27/28

500

4 3/8 + 1 5/9

5 67/72

Subtracting

100

6/7 - 1/3

11/21

200

7/9 - 3/5

8/45

300

9/10 - 3/4

3/20

400

5 4/5 - 3 1/3

2 7/15

500

What is the first step you have to do when adding or subtracting fractions or mixed numbers?

Find a common denominator

Multiplying

100

3/4 x 2/5

6/20 = 3/10

200

2/3 x 4/5

8/15

300

5/6 x 3/4

15/24 = 5/8

400

3/4 x 5/8

15/32

500

What is the main difference between adding and multiplying fractions?

When multiplying you don't need to find a common denominator.