Show:
adding
subtracing
multiplying
dividing
100

11/9 +2/3

8/9

100

1/8 +1/20

2/10

100

1/7 + 1/10

4/35

100

3/1 +1/4

12


200

3/4 +9/7

1/28

200

12/1 _ 1/20

23

200

8/5 *2/3

3/5

200

1/7 +1/4

4/7

300

5/6 +3/8

11/24

300

5/6_3/8

2/3


300

5/3 *5/3

7/9

300

1/3 *4/21

2/3

400

2/3 +1/8

19/24

400

12/1 -1/2

2/3

400

1/7 *1/10

4/35

400

1/3 *4/21

1/2


500

1/8 +1/20

1/2

500

3/4_7/9

1/28

500

3/4 *2/5

15/48

500

2/5 *1/2

9/10