五年级上册数学《小数除法》简便运算计算题。
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简介
五上数学简便运算计算题‖小数除法 类型一：同扩同缩商不变 A÷B=(A×C)÷(B×C) 13.6÷0.5 =(13.6×2)÷(0.5×2) =27.2÷1 =27.2 2.4÷0.25 =(2.4×4)÷(0.25×4) =9.6÷1 =9.6 1.2÷0.25 =(1.2×4)÷(0.25×4) =4.8÷1 =4.8 7.8÷0.125 =(7.8×8)÷(0.125×8) =62.4÷1 =62.4 类型二：连续除以两个数等于除以这两个数的积 A÷B÷C=A÷(B×C) 10÷1.25÷0.8 =10÷(1.25×0.8) =10÷1 =10 80÷0.5÷0.4 =80÷(0.5×0.4) =80÷0.2 =400 300÷2.5÷4 =300÷(2.5×4) =300÷10 =30 6.5÷0.8÷1.25 =6.5÷(0.8×1.25) =6.5÷1 =6.5
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