Show:
Adding
Subtracting
Multiplying
Dividing
50

3/4 + 9/4 = ??

= 12/4

simplified: 3/1

50

15/19 - 9/19 = ??

= 6/19

50

2/7 X 3/5 = ??

= 6/35

50

4/7 ÷ 3/6 = ?? 

= 24/21

simplified: 8/7

100

9/18 + 7/6 = ??

= 30/18

simplified: 5/3

100

12/15 - 3/5 = ??

= 3/15

simplified: 1/5

100

5/7 X 7/9 = ??

= 35/63

simplified: 5/9

100

6/13 ÷ 3 = ??

6/39

simplified: 2/13

200

13/28 + 9/7 = ??

36/28

simplified: 7/4

200

55/22 - 40/11 = ??

= -25/22

200

12/15 X 3/4 = ??

36/60

simplified: 3/5

200

9/13 ÷ 2/9 = ??

= 81/26

300

33/14 + 53/56 = ??

= 185/56
300

32/48 - 12/8 = ??

-40/48

simplified: -5/6

300

20/43 X 20/43 = ??

= 400/1849

300

16/38 ÷ 12/9 = ??

= 144/456

simplified: 6/19

400

73/84 + 7/3 = ??

= 269/84

400

67/23 - 38/48 = ??

= 1171/552

400

47/31 X 43/58 = ??

= 2021/1798

400

81/32 ÷ 21/34 = ??

459/112