Unit 7 Adding and Subtracting Fractions

Estimating

100

Estimate 3/4 + 1/3

1+0=1

200

Estimate 2/7+4/5

0+1=1

300

Estimate 1 3/4 - 5/6=

2-1=1

400

Estimate 7/8+3 4/5

1+4=5

500

Estimate 2 7/9-2/3

3-1=2

Add Fractions

100

1/3 + 1/4=

7/12

200

2/5 + 3/8=

31/40

300

5/6 + 2/9=

19/18 or 1 1/18

400

4/9 + 5/12=

31/36

500

4/15 + 7/9=

47/45 or 1 2/45

Subtract Fractions

100

9/10-3/5=

3/10

200

5/6-1/4=

7/12

300

5/7-2/5=

11/35

400

7/12-2/9=

13/36

500

13/15-4/9=

19/45

Add Mixed Numbers

100

3 4/5 + 2 3/5=

6 2/5

200

7 3/5 + 1 4/9=

9 2/45

300

4 8/15 + 3 7/10=

8 7/30

400

2 7/9 + 5 11/12=

8 25/36

500

Challenge: 11 9/14 + 2 5/21=

13 37/42

Subtract Mixed Numbers

100

4 3/7 - 2 1/7=

2 2/7

200

5 1/3 - 2 3/4=

2 7/12

300

9 1/6 - 4 5/9=

4 11/18

400

10 1/4 - 6 5/6=

3 5/12

500

8 2/9 - 5 7/10=

2 47/90