直接写出得数
| 72× | |||
| 36÷ |
我能用简便方法计算下面各题.
| 273×4500-45×17300 | 9999×7778+3333×6666. |
x和y成________比例.
| x | 2 | 3 | 5 | ________ | 10 |
| y | ________ | 4.5 | 7.5 | 12 | ________ |
| 直接写出得数. 3.6+9= | 324-199= | 0.78+1.52= |
| 25×7×4= | 125×24= | 4.6÷100= |
| 0.5×100= | 10-4.8-5.2= | 5-0.08= |
| 28÷4×7= | 0÷(5.9×6.1)= | 136+72+328= |