| 0.07+0.13= | 0.88-0.8= | 12.5÷10%= | 0.05×200= |
( + )×38= | 137%×100-100= | × ÷ × = | 14.9×(14.9-14.9)÷14.9= |
| 解:0.07+0.13=0.2, | 0.88-0.8=0.08, | 12.5÷10%=125, | 0.05×200=10, |
( + )×38=18, | 137%×100-100=37, | × ÷ × = , | 14.9×(14.9-14.9)÷14.9=0. |
分析:根据小数、分数和百分数加减乘除的计算方法进行计算即可.
点评:口算时,注意运算符号和数据,然后再进一步计算即可.
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