| 36+79= | 15÷1%= | 9.1-1.9= | 7.2÷0.6= | 0.25×8= |
÷ = | - = | × = | 1+30%= | + = |
| 0.52= 9π= | - = | 0.47+0.38= | 0.52= | ÷ × = |
| 解:36+79=115, | 15÷1%=1500, | 9.1-1.9=7.2, | 7.2÷0.6=12, | 0.25×8=2, |
÷ = , | - = , | × = , | 1+30%=1.3, | + = , |
| 0.52=0.25, 9π=28.26, | - = , | 0.47+0.38=0.85, | 0.52=0.25, | ÷ × = . |
分析:根据整数、小数、百分数和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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