题目内容
| 口算. 2.5+3.7= | 12-0.8= | 0.64-0.06= | 0.69+2.31= | 2.36+8.7= |
| 9.8-8.9= | 0.52+0.4= | 0.83+1.7= | 0.87-0.46= | 0.08+5.92= |
| 2.5+3.7=6.2 | 12-0.8=11.2 | 0.64-0.06=0.58 | 0.69+2.31=3 | 2.36+8.7=11.06 |
| 9.8-8.9=0.9 | 0.52+0.4=0.92 | 0.83+1.7=2.53 | 0.87-0.46=0.41 | 0.08+5.92=6 |
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