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4.49÷1.25+3.31×0.8+2.2×0.8的简便算法

4.49÷1.25+3.31*0.8+2.2*0.8=4.49÷5/4+3.31*0.8+2.2*0.8=4.49*0.8+3.31*0.8+2.2*0.8=(4.49+3.31+2.2)*0.8=10*0.8=8

23.2÷1.25-3.2*0.8=23.2*0.8-3.2*0.8=(23.2-3.2)*0.8=20*0.8=16

原式=6.24*8÷(1.25*8)+0.8 =49.92÷10+0.8 =4.992+0.8 =5.792

2.25÷1.25+7.75*0.8=2.25+7.75÷1.25*0.8=2.25+7.75÷1=2.25+7.75=10求采纳哦~

28.9*1.25*0.8=28.9*(1.25*0.8)=28.9*1=28.9

原式=23.56÷(1.25*0.8) =23.56÷1 =23.56

5.341.25x0.8用简便计算这么算, 5.341.25x0.8 =5.34*(1.25*0.8) =5.34*1 =5.34

7.35÷1.25÷0.8=7.35÷(1.25*0.8)=7.35÷1=7.35

3.4除以1.25除以0.8用简便方法=3.4÷(1.25x0.8)=3.4÷1=3.4

你好!1.25*7.45*0.8的简便运算(1.25*0.8)*(0.7*0.9)=1*0.63=0.63 如有疑问,请追问.

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