直接写得数.
| 0.99+1.8= | 4.2÷3.5= | 1.5×0.4= | 1.72-0.7= |
| 0.84÷2= | 2×0.05= | 0.72÷0.9= | 2.4÷0.06= |
| 0.4×0.8×2.5= | 7.8+0.3-7.8+0.3= |
给7.5添上百分号,这个数将( )
| A、扩大100倍 | B、缩小100倍 |
| C、大小不变 |