00:00:00
1260
- 600 + 660 =
1000
- 900 + 100 =
1900
- 950 + 950 =
100
- 1000 - 900 =
800
- 1000 - 200 =
700
- 1000 - 300 =
600
- 1000 - 400 =
450
- 1000 - 550 =
0
- 1000 - 1000 =