直接写出得数. × = | 2.4÷ = | 7- - = | 0.24×50%= |
÷7= | ×37.5%= | 1÷ ÷1= | ÷ = |
× = | 1 ÷ = | ×9+ = | ÷ = |
× = , | 2.4÷ =8, | 7- - =6, | 0.24×50%=0.12, |
÷7= , | ×37.5%= , | 1÷ ÷1=5, | ÷ = , |
× = , | 1 ÷ = , | ×9+ =5, | ÷ = . |
分析:根据分数的乘除法和百分数的乘法的计算方法进行计算即可;
×9+
可以根据乘法分配律进行简算.点评:口算时,注意运算符号和运算数据,然后再进行计算,能简算的要简算.
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