用竖式计算.
72÷8= | 46÷7= | 65÷8= |
计算下面各题(要写出计算过程)
(+)÷+ | +8×(-) | (-)× | ×+×. |
直接写得数
2×3.14×8= | = | = | 25%+= |
(1-)×(-)= | = | 1.75-(0.75+)= | 3.14×9= |
选择合理的方法计算:
÷10 | ×10× | ×÷ |
÷2÷ | 12×(+) | ×+×. |
脱式计算,能简算的要简算.
0.25×[(2.8+4.4)÷1.2] | 3.7×9.16+6.3×9.16 |
[32-(1.95-1.95)]÷1.6 | 5.7×10.1. |
72÷8= | 46÷7= | 65÷8= |
(+)÷+ | +8×(-) | (-)× | ×+×. |
2×3.14×8= | = | = | 25%+= |
(1-)×(-)= | = | 1.75-(0.75+)= | 3.14×9= |
÷10 | ×10× | ×÷ |
÷2÷ | 12×(+) | ×+×. |
0.25×[(2.8+4.4)÷1.2] | 3.7×9.16+6.3×9.16 |
[32-(1.95-1.95)]÷1.6 | 5.7×10.1. |