Adding
Subtracting

Simplify
Equal to
Random
150

3/9+5/9

8/9

150

19/30-11/30

8/30

150

90/180

1/2

150

68/72

34/36  or  136/144

150

1/1 + 2/1

3

300

123/41 + 15/3

8

300

648/8-640/8

1

300

2560/1280

1/1  2/2  3/3  4/4  5/5

300

100/80

1 2/8

300

123/41+126/63-125/25

0

450

123/41+369/123

6

450

999/1000-681/1000

317/1000

450

1500/2900

15/29

450

978/1938

1156/3876

450

456/789+295/789-649/789

102/789

600

899/1300+270/1300

1169/1300

600

2750/4360-1963/4360

1783/4360

600

410/750

41/75

600

376/763

752/1526

600

6030/9500-467/9500

5533/9500

750

1989/2807+41/2807

2030

750

3879/5043-1054/5043

2835/5043

750

735/800

147/160

750

8545/18545

17090/37090

750

6854/8546

3427/4273  13708/17092

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