adding and subtracting
multiplying fractings
100

67-37

30

100

4/1 x 3/5

12/5

200

20-8

12

200

6/7 x 1/1

6/77

300

20+7

27

300

2/3 x 5

10/3

400

40+20

60

400

1            5

_     x     _

6            5

5

_

30

500

30+37

67777

500

6/9 x 6/8

36/72

M
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