Solve the following expressions: (40 – 10) + (6 – 5) (50 – 30) + (7 – 3) (20 – 10) + (5 – 3)

Решение:

1. \( (40 - 10) + (6 - 5) = 30 + 1 = 31 \)
2. \( (50 - 30) + (7 - 3) = 20 + 4 = 24 \)
3. \( (20 - 10) + (5 - 3) = 10 + 2 = 12 \)

Ответ: 31, 24, 12.