计算下面各题,能用简便算法的用简便算法
| (1)2.3+3.91÷(22-19.7) | (2)13.7×0.125×8 | (3)18-(1.4+1.25×2.4) | (4)2.65×1.7+1.35×1.7. |
| (1)2.3+3.91÷(22-19.7) | (2)13.7×0.125×8 | (3)18-(1.4+1.25×2.4) | (4)2.65×1.7+1.35×1.7. |