| (9.85-6.4)÷1.5 | 12.6+7.4÷20 | 25.2÷9+28.2 | 17.5÷(12.8+22.2) |
| 12.4×(800÷16) | 18.9÷[(9.6-6.9)×1.4] | 3.04-3.04×0.25. |
计算下面各题,能简算的要简算.
| 8.5×(2.36+2.42)÷0.25 | 3.9÷1.3×6 | 4.25×6.3+3.7×4.25 |
| 205×99 | 25.6-7.49-2.51 | 2.5-(6.8-4.9)×0.8. |