| Zero |
| 0-0=0 |
| One |
| 1-0=1 |
1-1=0 |
| Two |
| 2-0=2 |
2-1=1 |
2-2=0 |
| Three |
| 3-0=3 |
3-1=2 |
3-2=1 |
3-3=0 |
| Four |
| 4-0=4 |
4-1=3 |
4-2=2 |
4-3=1 |
4-4=0 |
| Five |
| 5-0=5 |
5-1=4 |
5-2=3 |
5-3=2 |
5-4=1 |
| 5-5=0 |
| Six |
| 6-0=6 |
6-1=5 |
6-2=4 |
6-3=3 |
6-4=2 |
| 6-5=1 |
6-6=0 |
| Seven |
| 7-0=7 |
7-1=6 |
7-2=5 |
7-3=4 |
7-4=3 |
| 7-5=2 |
7-6=1 |
7-7=0 |
| Eight |
| 8-0=8 |
8-1=7 |
8-2=6 |
8-3=5 |
8-4=4 |
| 8-5=3 |
8-6=2 |
8-7=1 |
8-8=0 |
| Nine |
| 9-0=9 |
9-1=8 |
9-2=7 |
9-3=6 |
9-4=5 |
| 9-5=4 |
9-6=3 |
9-7=2 |
9-8=1 |
9-9=0 |
| Ten |
| 10-0=10 |
10-1=9 |
10-2=8 |
10-3=7 |
10-4=6 |
| 10-5=5 |
10-6=4 |
10-7=3 |
10-8=2 |
10-9=1 |
| 10-10=0 |
| Eleven |
| 11-1=10 |
11-2=9 |
11-3=8 |
11-4=7 |
11-5=6 |
| 11-6=5 |
11-7=4 |
11-8=3 |
11-9=2 |
11-10=1 |
| Twelve |
| 12-2=10 |
12-3=9 |
12-4=8 |
12-5=7 |
12-6=6 |
| 12-7=5 |
12-8=4 |
12-9=3 |
12-10=2 |
| Thirteen |
| 13-3=10 |
13-4=9 |
13-5=8 |
13-6=7 |
13-7=6 |
| 13-8=5 |
13-9=4 |
13-10=3 |
| Fourteen |
| 14-4=10 |
14-5=9 |
14-6=8 |
14-7=7 |
14-8=6 |
| 14-9=5 |
14-10=4 |
| Fifteen |
| 15-5=10 |
15-6=9 |
15-7=8 |
15-8=7 |
15-9=6 |
| 15-10=5 |
| Sixteen |
| 16-6=10 |
16-7=9 |
16-8=8 |
16-9=7 |
16-10=6 |
| Seventeen |
| 17-7=10 |
17-8=9 |
17-9=8 |
17-10=7 |
| Eighteen |
| 18-8=10 |
18-9=9 |
18-10=8 |
| Nineteen |
| 19-9=10 |
19-10=9 |
| Twenty |
| 20-10=10 |
An example of subtraction. 8 - 5 = 3
5 + 3 = 8
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8 |
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1 |
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3 |