Der Neuner-Trick
7 + 9 = ?
Plus 9 — plus 10, minus 1:
- 7 + 10 = 17
- 17 − 1 = 16
- 7 + 9 = 16
3 + 9 = ?
Plus 9 — plus 10, minus 1:
- 3 + 10 = 13
- 13 − 1 = 12
- 3 + 9 = 12
9 + 5 = ?
Plus 9 — plus 10, minus 1:
- 10 + 5 = 15
- 15 − 1 = 14
- 9 + 5 = 14
4 + 9 = ?
Plus 9 — plus 10, minus 1:
- 4 + 10 = 14
- 14 − 1 = 13
- 4 + 9 = 13
5 + 9 = ?
Plus 9 — plus 10, minus 1:
- 5 + 10 = 15
- 15 − 1 = 14
- 5 + 9 = 14
9 + 6 = ?
Plus 9 — plus 10, minus 1:
- 10 + 6 = 16
- 16 − 1 = 15
- 9 + 6 = 15
9 + 4 = ?
Plus 9 — plus 10, minus 1:
- 10 + 4 = 14
- 14 − 1 = 13
- 9 + 4 = 13
9 + 3 = ?
Plus 9 — plus 10, minus 1:
- 10 + 3 = 13
- 13 − 1 = 12
- 9 + 3 = 12
6 + 9 = ?
Plus 9 — plus 10, minus 1:
- 6 + 10 = 16
- 16 − 1 = 15
- 6 + 9 = 15
9 + 7 = ?
Plus 9 — plus 10, minus 1:
- 10 + 7 = 17
- 17 − 1 = 16
- 9 + 7 = 16
7 + 9 = ?
7 + 9 = 16
Plus 9 — plus 10, minus 1:
- 7 + 10 = 17
- 17 − 1 = 16
- 7 + 9 = 16
6 + 9 = ?
6 + 9 = 15
Plus 9 — plus 10, minus 1:
- 6 + 10 = 16
- 16 − 1 = 15
- 6 + 9 = 15
9 + 4 = ?
9 + 4 = 13
Plus 9 — plus 10, minus 1:
- 10 + 4 = 14
- 14 − 1 = 13
- 9 + 4 = 13
9 + 7 = ?
9 + 7 = 16
Plus 9 — plus 10, minus 1:
- 10 + 7 = 17
- 17 − 1 = 16
- 9 + 7 = 16
5 + 9 = ?
5 + 9 = 14
Plus 9 — plus 10, minus 1:
- 5 + 10 = 15
- 15 − 1 = 14
- 5 + 9 = 14
9 + 3 = ?
9 + 3 = 12
Plus 9 — plus 10, minus 1:
- 10 + 3 = 13
- 13 − 1 = 12
- 9 + 3 = 12
9 + 6 = ?
9 + 6 = 15
Plus 9 — plus 10, minus 1:
- 10 + 6 = 16
- 16 − 1 = 15
- 9 + 6 = 15
9 + 5 = ?
9 + 5 = 14
Plus 9 — plus 10, minus 1:
- 10 + 5 = 15
- 15 − 1 = 14
- 9 + 5 = 14
4 + 9 = ?
4 + 9 = 13
Plus 9 — plus 10, minus 1:
- 4 + 10 = 14
- 14 − 1 = 13
- 4 + 9 = 13
3 + 9 = ?
3 + 9 = 12
Plus 9 — plus 10, minus 1:
- 3 + 10 = 13
- 13 − 1 = 12
- 3 + 9 = 12
9 + ? = 13
9 + 4 = 13
Plus 9 — plus 10, minus 1:
- 10 + 4 = 14
- 14 − 1 = 13
- 9 + 4 = 13
6 + ? = 15
6 + 9 = 15
Plus 9 — plus 10, minus 1:
- 6 + 10 = 16
- 16 − 1 = 15
- 6 + 9 = 15
9 + ? = 16
9 + 7 = 16
Plus 9 — plus 10, minus 1:
- 10 + 7 = 17
- 17 − 1 = 16
- 9 + 7 = 16
3 + ? = 12
3 + 9 = 12
Plus 9 — plus 10, minus 1:
- 3 + 10 = 13
- 13 − 1 = 12
- 3 + 9 = 12
9 + ? = 15
9 + 6 = 15
Plus 9 — plus 10, minus 1:
- 10 + 6 = 16
- 16 − 1 = 15
- 9 + 6 = 15
9 + ? = 12
9 + 3 = 12
Plus 9 — plus 10, minus 1:
- 10 + 3 = 13
- 13 − 1 = 12
- 9 + 3 = 12
9 + ? = 14
9 + 5 = 14
Plus 9 — plus 10, minus 1:
- 10 + 5 = 15
- 15 − 1 = 14
- 9 + 5 = 14
7 + ? = 16
7 + 9 = 16
Plus 9 — plus 10, minus 1:
- 7 + 10 = 17
- 17 − 1 = 16
- 7 + 9 = 16
4 + ? = 13
4 + 9 = 13
Plus 9 — plus 10, minus 1:
- 4 + 10 = 14
- 14 − 1 = 13
- 4 + 9 = 13
5 + ? = 14
5 + 9 = 14
Plus 9 — plus 10, minus 1:
- 5 + 10 = 15
- 15 − 1 = 14
- 5 + 9 = 14