| 728-299= | 0.125×0.125= | 6÷ = | × ×0= | 24×( - )= |
÷5= | + = | 0.1×20%= | (0.8-0.5)÷0.5= | 3×6÷3×6= |
| 解:728-299=429, | 0.125×0.125= , | 6÷ =7, | × ×0=0, | 24×( - )=2, |
÷5= , | + = , | 0.1×20%=0.02, | (0.8-0.5)÷0.5=0.6, | 3×6÷3×6=36. |
分析:根据整数、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,然后再进一步计算即可.
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