Show:
Dividing
Subtracting
Adding
Multiplying
nothing
100

4/4 divided by 2/4

2/4

100

2/4 minus 1/4

1/4

100

1/4 plus 3/4

4/4

100

2/4 times 1/4

2/4

100

extra

extra

200

9/5 divided by 3/5

3/5

200

40/40 minus 27/40

13/40

200
23/100 plus -24/100

-1/100

200

45/100 times 3/100

135/100 or 1 35/100

300

20/40 divided by 10/40

2/40 or 1/20

300

20/40 minus -12/40

8/40

300

34/50 plus 22/50

56/50 or 1 6/50

300
23/40 times 3/40

92/40 or 2 12/40

400

44/100 divided by -22/100

-2/100 or  -1/50

400

30/40 minus -37/40

-7/40

400

-24/305 plus 34/305

-10/305

400

-23/40 times 12/40 

-276/40 or 6 36/40

500

-20/60 divided by -10/30

-1/60

500

45/200 minus -140/200

-95/200

500

34/500 plus -434/500

-400/500 or -4/5

500

-34/200 times 30/200

-1,020/200 or 5 20/200