Show:
Addition
Subtraction
Fractions
Multiplying
Positive or Negative
100

5 + 5 

10

100

10-10

0

100

1/2 + 1/2 

1 or 2/2

100

1 x 1

1

100

- 1

negative

200

23 + 17

40

200

29-17

12

200

5/15 + 4/15

9/15 

200

0 x 20300

0

200

100

positive

300

49 + 39

88

300

50-13

37

300

10/20 + 8/20

18/20

300

3 x 2

6

300

300

positive 

400

123 + 47

170

400

239-117

122

400

30/45 + 13/45 

43/45

400

5 x 4

20

400

-45

negative

500

540 + 275

815

500

785-215

570

500

64/150 + 74/150

138/150

500

10 x 8

80

500

∞

Positive