题目内容
口算.
| 8.1-2.9= | 2.5×4= | 6.3+3.7= | 25×0.8= | 7-1.9-4.1=1 |
| 2-9.9= | 14÷28= | 1.6×9+1.6= | 3×1.4= |
| 8.1-2.9=5.2, | 2.5×4=10, | 6.3+3.7=10, | 25×0.8=20, | 7-1.9-4.1=1, |
| 2-9.9=-7.9, | 14÷28=0.5, | 1.6×9+1.6=16, | 3×1.4=4.2. |
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