口算
| 0.46-0.06= | 3.7+4.3= | 1+0.55= | 4.6-1.8= |
| 0.65+0.32= | 10-9.9= | 4+0.92= | 4.1-1.1= |
| 0.05+0.5= | 7.2+1.8= | 1.7+0.37= | 6.6-6= |
| 0.46-0.06= | 3.7+4.3= | 1+0.55= | 4.6-1.8= |
| 0.65+0.32= | 10-9.9= | 4+0.92= | 4.1-1.1= |
| 0.05+0.5= | 7.2+1.8= | 1.7+0.37= | 6.6-6= |