18.7, 17.8, 19.6, 106.7-107.6, 203.4-204.3, 150.6-160.5, 180-120.5:6, 210-140.5:7, 240-160.5:8

Решение:

1. \[ 18 \times 7 = 126 \]
2. \[ 17 \times 8 = 136 \]
3. \[ 19 \times 6 = 114 \]
4. \[ 107.6 - 106.7 = 0.9 \]
5. \[ 204.3 - 203.4 = 0.9 \]
6. \[ 160.5 - 150.6 = 9.9 \]
7. \[ 180 - (120 \times 5) : 6 = 180 - 600 : 6 = 180 - 100 = 80 \]
8. \[ 210 - (140 \times 5) : 7 = 210 - 700 : 7 = 210 - 100 = 110 \]
9. \[ 240 - (160 \times 5) : 8 = 240 - 800 : 8 = 240 - 100 = 140 \]