Adding & Subtracting with common denominators
Simplifying
Equivalent
Converting
Adding & subtracting with unlike denominators
100

1/8 + 4/8=

5/8

100

2/4

1/2

100

2/4=

1/2

100

1 2/7=

9/7

100

20/100 + 6/10=

80/100

200

3/4 - 2/4=

1/4

200

12/16

3/4

200

6/8=

3/4

200

15/6

2 3/6 or 2 1/2

200

4/6 + 2/12=

10/12 or 5/6

300

3/16 + 10/16=

13/16

300

14/21

2/3

300

3/7=

15/35

300

1 4/5=

9/5

300

40/100 - 1/10=

30/100

400

8/12 - 6/12=

2/12

400

15/40

3/8

400

6/24=

3/12 or 1/4

400

2 1/4= 

9/4

400

3/7 - 7/21=

2/21

500

3/5 + 2/5=

5/5 or 1 whole

500

64/132

16/33

500

60/120=

6/12 or 1/2

500

20/6=

3 2/6 or 3 1/3

500

4/15 + 2/3=

14/15

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