计算下面各题,能用简便算法的用简便算法
12.25-3.1+0.85-6.17
2.65×1.7+1.35×1.7
3.6÷(1.2+0.5)×5
0.125×0.38×80
21.36÷0.8-12.9.
在横线里填上“>、<、﹦”.
3.58×0.7________3.58; | 56×1.4________56; |
22.4÷1.2________22.4; | 0.544÷0.16________0.544. |