time
add
minus
100

11x5

55

100

11+1,000

1,010

100

15-5

10

200

5x5

25

200

200,000+5,000

205,000

200

0-1

1

300

0x11

0

300

5+8

13

300

13-2

11

400

6x6

24

400

15+6

21

400

12-2

10

500

12x2

24

500

100+100

200

500

14-8

6

M
e
n
u