计算下面各题,注意使用简便方法.
| 10- | [1-( | ( |
| (19- | 2- |
| (1)25dm2=______cm2 | (2)70km2=______m2 |
| (3)4300t=______kg | (4)530L-53000mL=______L |
| (5)68000g+320kg=______g. |
| 10- | [1-( | ( |
| (19- | 2- |
| (1)25dm2=______cm2 | (2)70km2=______m2 |
| (3)4300t=______kg | (4)530L-53000mL=______L |
| (5)68000g+320kg=______g. |