+ = | +0.625= | × = | ÷7= | 0.28+4.52= |
| 9.1÷1.3= | 9× ÷9× = | 3.2÷4= | 4÷0.01×0.1= | 18 ÷9= |
解: + =2, | +0.625=1.25, | × = , | ÷7= , | 0.28+4.52=4.8, |
| 9.1÷1.3=7, | 9× ÷9× = , | 3.2÷4=0.8, | 4÷0.01×0.1=40, | 18 ÷9=2 . |
分析:根据分数、小数的加减乘除的计算方法进行计算即可.9×
÷9×
按照从左向右的顺序进行计算.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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×
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