+0.125= | 4× ÷4× = | - = | 0.1×10÷0.1×10= | 2.5×40= |
- × = | 36:0.8= | 8.9×11-8.9= | ÷ = | 10÷0.1×10= |
解: +0.125=0.75, | 4× ÷4× = , | - = , | 0.1×10÷0.1×10=100, | 2.5×40=100, |
- × = , | 36:0.8=45, | 8.9×11-8.9=89, | ÷ = , | 10÷0.1×10=1000. |
分析:根据分数和小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,然后再进一步解答即可.
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