Решение:
- 7 - 7 - 13 = 0 - 13 = -13
- 40 - 7 * 4 = 40 - 28 = 12
- (21 + 21) : 6 = 42 : 6 = 7
- 6 * 8 - 23 = 48 - 23 = 25
- 7 * 9 - 43 = 63 - 43 = 20
- (23 - 16) * 9 = 7 * 9 = 63
- 7 * 9 - 7 * 5 = 63 - 35 = 28
- 8 * 10 - 7 * 8 = 80 - 56 = 24
- 10 * (56 - 50) = 10 * 6 = 60
Ответ: -13, 12, 7, 25, 20, 63, 28, 24, 60