Aftrekken met puntsommen tot 20 zonder brug
14 | - | 3 | = | 11 | | 11 | - | | = | 11 | | 16 | - | | = | 5 | | 17 | - | | = | 14 | | 15 | - | | = | 15 | | | 20 | - | 20 | = | 0 | | 12 | - | 2 | = | 10 | | 16 | - | 13 | = | 3 | | 20 | - | 20 | = | 0 | | 18 | - | 1 | = | 17 | | | 10 | - | | = | 0 | | 15 | - | 5 | = | 10 | | 10 | - | | = | 0 | | 20 | - | | = | 10 | | 18 | - | | = | 14 | | | 10 | - | 10 | = | 0 | | 13 | - | 0 | = | 13 | | 20 | - | | = | 10 | | 18 | - | 3 | = | 15 | | 20 | - | 0 | = | 20 | | |
| 18 | - | | = | 10 | | 10 | - | 10 | = | 0 | | 20 | - | | = | 10 | | 16 | - | 0 | = | 16 | | 19 | - | | = | 14 | | | 17 | - | 5 | = | 12 | | 15 | - | | = | 0 | | 20 | - | 10 | = | 10 | | 10 | - | 0 | = | 10 | | 15 | - | 0 | = | 15 | | | 13 | - | | = | 2 | | 20 | - | | = | 10 | | 13 | - | 11 | = | 2 | | 17 | - | | = | 4 | | 10 | - | 0 | = | 10 | | | 15 | - | 15 | = | 0 | | 20 | - | 0 | = | 20 | | 10 | - | 0 | = | 10 | | 14 | - | | = | 12 | | 19 | - | 18 | = | 1 | | |
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