直接写得数．
| 3.6×0.1= | 2.5×4= | 7.2÷1.2= | 3.9÷3.9= | 1-0.2×4= |
| 0.25×4×3= | 1.6+1.6×4= | 2.5÷（2×5）= | 0.98-0.8= | 2.1+0.5= |
| 3.6×0.1= | 2.5×4= | 7.2÷1.2= | 3.9÷3.9= | 1-0.2×4= |
| 0.25×4×3= | 1.6+1.6×4= | 2.5÷（2×5）= | 0.98-0.8= | 2.1+0.5= |