-0.01= | 1.53+47= | + = | ÷9= |
× = | +0.75= | ÷ = | 1-25%= |
0.6÷ = | 125×8= | ×1.8= | 0.8÷1.6= |
( - )×12= | 402-62-38= | 752-598= | 99+999+2= |
-0.01=0.09, | 1.53+47=48.53, | + = , | ÷9= , |
× = , | +0.75=0.95, | ÷ =1.5, | 1-25%=0.75, |
0.6÷ =1, | 125×8=1000, | ×1.8=1.2, | 0.8÷1.6=0.5, |
( - )×12=1, | 402-62-38=302, | 752-598=154, | 99+999+2=1100. |
分析:根据分数、整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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