Решение:
- 1. \( (91 - 46) \cdot 3 + 18 \)
\( 91 - 46 = 45 \)
\( 45 \cdot 3 = 135 \)
\( 135 + 18 = 153 \) - 2. \( (84 : 6 + 18) \cdot 5 - 120 \)
\( 84 : 6 = 14 \)
\( 14 + 18 = 32 \)
\( 32 \cdot 5 = 160 \)
\( 160 - 120 = 40 \) - 3. \( 75 : 25 + 17 + 2 \cdot (74 - 25) \)
\( 74 - 25 = 49 \)
\( 2 \cdot 49 = 98 \)
\( 75 : 25 = 3 \)
\( 3 + 17 = 20 \)
\( 20 + 98 = 118 \)
Ответ: 1. 153; 2. 40; 3. 118.