Subtrahiere diese vier Zahlen (1)

Subtrahiere diese vier Zahlen.

1. 87 – 27 – 30 – 20 =
2. 50 – 12 – 20 – 16 =
3. 54 – 22 – 14 – 15 =
4. 80 – 30 – 22 – 19 =
5. 72 – 26 – 17 – 18 =
6. 82 – 27 – 30 – 20 =
7. 54 – 16 – 13 – 18 =
8. 65 – 28 – 14 – 16 =
9. 72 – 20 – 23 – 19 =
10. 75 – 29 – 29 – 14 =
11. 68 – 26 – 24 – 11 =
12. 76 – 24 – 26 – 19 =