五上数学小数乘除法简便计算
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简介
0.56×8.5+5.6×0.15 =5.6×0.85+5.6×0.15 =5.6×(0.85+0.15) =5.6×1 =5.6 0.25×3.2×12.5 =0.25×(4×0.8)×12.5 =(0.25×4)×(0.8×12.5) =1×10 =10 7.35÷(7.35×0.25) =7.35÷7.35÷0.25 =1÷0.25 =4 6.45÷0.7+7.55÷0.7 =(6.45+7.55)÷0.7 =14÷0.7 =20 (8.1+0.72÷0.9) =8.1÷0.9+0.72÷0.9 =9+0.8 =9.8
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