Topic 7 Add/Sub Fractions

Estimating

100

Estimate! 2/10 + 7/9 = 

1

200

Estimate! 4/9 + 3/5 =

1

300

Estimate! 7/8 - 4/11

1/2

400

DOUBLE JEOPARDY

Estimate! 6/11 + 9/10

1 1/2

500

Estimate! 10/11 + 7/8

2

Common Denominator

100

Find the common denominator:

5/11

7/10

50/110

77/110

200

Find the common denominator:

2/9 =

5/7 =

14/63

45/63

300

Find the common denominator:

3/4 =

5/7 =

21/28

20/28

400

Find the common denominator:

1/6=

2/3=

1/6

4/6

500

Find the common denominator:

7/8 = 

6/7 =

49/56

48/56

Subtract

100

1/3 - 1/6

1/6

200

8/9 - 1/3

5/9

300

Double Jeopardy!

5/6 - 1/9

13/18

400

11/12 - 1/6

9/12

500

4/11 - 2/7

6/77

Add

100

3/5 + 2/3

1 4/15

200

9/10 + 1/5

1 1/10

300

9/11 + 2/3

1 16/33

400

7/12 + 1/6

9/12

500

1/12 + 2/3

9/12

Mixed Numbers

100

5 11/12 + 10 1/4

16 1/6

200

2 2/3 + 9 5/12

12 1/12

300

1 3/16 + 10

11 3/16

400

12 2/3 - 9 1/2

3 1/6

500

12 - 1 2/3

10 1/3