Adding and Subtracting Fractions

Estimating

100

What benchmark fraction is 11/12 closest to?

1 whole

200

What benchmark fraction is 3/8 closest to?

1/2

300

What benchmark fraction is 1/6 closest to?

0

400

What benchmark fraction is 7/8 closest to?

1 whole

500

What benchmark fraction is 5/12 closest to?

1/2

Equivalent Fractions

100

1/3 and 4/9

3/9 and 4/9

200

3/4 and 2/5

15/20 and 8/20

300

4/7 and 2/3

12/21 and 14/21

400

2/15 and 4/5

2/15 and 12/15

500

2/5 and 7/8

16/40 and 35/40

Adding

100

1/2 + 1/4

3/4 or 6/8

200

1/9 + 5/6

34/36 or 51/54 

300

2/8 + 1/2

6/8 or 12/16

400

1/3 + 2/9

5/9

500

4/7 + 5/14

13/14

Subtracting

100

5/6 - 5/12

5/12 or 30/72

200

4/3 - 2/5

14/15

300

7/9 - 1/18

13/18

400

5/9 - 8/27

7/27

500

5/8 - 3/16

7/16