1. Реши примеры. (66-40) + 2 = 28 45 - (10-9) = 46 48 - 4 + 20 = 64 (55-30) + 3 = 28 56 - (11-8) = 53 57 - 5 + 30 = 87 (44-20) + 4 = 28 67 - (12-7) = 61

Решение:

1. \( (66-40) + 2 = 26 + 2 = 28 \)
2. \( 45 - (10-9) = 45 - 1 = 44 \)
3. \( 48 - 4 + 20 = 44 + 20 = 64 \)
4. \( (55-30) + 3 = 25 + 3 = 28 \)
5. \( 56 - (11-8) = 56 - 3 = 53 \)
6. \( 57 - 5 + 30 = 52 + 30 = 82 \)
7. \( (44-20) + 4 = 24 + 4 = 28 \)
8. \( 67 - (12-7) = 67 - 5 = 62 \)

Ответ: 28, 44, 64, 28, 53, 82, 28, 62.