( )时整,时针和分针重合.
| A、9 | B、12 | C、6 |
口算:
| 1.38-0.8= | 630÷90= | 6-0.37= |
| 100+100×0= | 24×5= | 2.73+0.27= |
| 0.75+0.3= | 5×2+3= | 4.3÷1000= |
| 0.69+1.1= | 0.4+0.66= | 18-6÷3= |