addition
subtraction
multiplication
division
100

50 + 50

100

100

25 - 15

10

100

5 x 5

25

100

32 / 8

4

200

150 + 150

300

200

22 - 19

3

200

10x 10 

100

200

420 / 6

70

300

400+400

800

300

15 -2

13

300

30 x 30 

900

300

50 / 5

10

400

1000 +1000

2000

400

30 - 10

20

400

11 x 9

99

400

72 / 8

9

500

190 + 15

205

500

150 - 40

110

500

12 x 6

72

500

36/3

12