题目内容
口算题．
| 0.8×25= | 0×4.23= | 0.57+0.43= | 2.4×0.2= |
| 0.02×50= | 2.8×10= | 8.29×100= | 2.5×0.4= |
| 0.8×25=20 | 0×4.23=0 | 0.57+0.43=1 | 2.4×0.2=0.48 |
| 0.02×50=1 | 2.8×10=28 | 8.29×100=829 | 2.5×0.4=1 |
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