45 - 15 \( \cdot \) 6 : 18 = 45 - 90 : 18 = 45 - 5 = 40
8 + 28 : 7 \( \cdot \) 16 = 8 + 4 \( \cdot \) 16 = 8 + 64 = 72
25 - 3 \( \cdot \) 15 - 4 = 25 - 45 - 4 = -20 - 4 = -24
56 + 4 \( \cdot \) 8 - 20 = 56 + 32 - 20 = 88 - 20 = 68
(67 - 20) \( \cdot \) 3 = 47 \( \cdot \) 3 = 141
(72 - 30) : 6 = 42 : 6 = 7
7 \( \cdot \) (9 + 5) = 7 \( \cdot \) 14 = 98
15 \( \cdot \) (14 - 9) = 15 \( \cdot \) 5 = 75
0 \( \cdot \) 27 = 0
0 + 27 = 27
27 - 0 = 27