3+1 = 3-3 = 5+3 = 3+4 = 3-2 = 0+3 = 3+5 = 3-1 = 7+3 = 9+3 =
10- 3 = 12+3 = 3+15 =
11- 3 = 10+3 =
3 -.....= 0
4 - 3 =.....
5 - 3 =.....
.....-3=3
10 - 3 =.....
7 - 3 =.....
.....-3=6
5 - 3 =.....
11 - 3 =.....
15 - 3 =.....
..-3=9
14 - 3 =.....
16 - 3 =.....
- 3 = 10
19 - 3 =.....