1. Вычислите: 1) 18 ⋅ 3 + 46 2) 21 ⋅ 4 − 78 3) 33 ⋅ 3 − 57 4) 72 : 12 + 25 5) (96 − 54) : 6 6) (59 + 49) : 9

Решение:

1. \( 18 \cdot 3 + 46 = 54 + 46 = 100 \)
2. \( 21 \cdot 4 - 78 = 84 - 78 = 6 \)
3. \( 33 \cdot 3 - 57 = 99 - 57 = 42 \)
4. \( 72 : 12 + 25 = 6 + 25 = 31 \)
5. \( (96 - 54) : 6 = 42 : 6 = 7 \)
6. \( (59 + 49) : 9 = 108 : 9 = 12 \)

Ответ: 100; 6; 42; 31; 7; 12.