3.6*42.3*3.75-12.5*14*0.846 如何简便运算
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3.6*42.3*3.75-12.5*14*0.846 如何简便运算
![3.6*42.3*3.75-12.5*14*0.846 如何简便运算](/uploads/image/z/600398-62-8.jpg?t=3.6%2A42.3%2A3.75-12.5%2A14%2A0.846+%E5%A6%82%E4%BD%95%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
因为 3.75=12.5*0.3
42.3=0.846*50
42.3*3.75=12.5*0.846*15
所以3.6*42.3*3.75=12.5*0.846*15*3.6=12.5*0.846*54
所以3.6*42.3*3.75-12.5*14*0.846=12.5*0.846*(54-14)=12.5*40*0.846=500*0.846=423
42.3=0.846*50
42.3*3.75=12.5*0.846*15
所以3.6*42.3*3.75=12.5*0.846*15*3.6=12.5*0.846*54
所以3.6*42.3*3.75-12.5*14*0.846=12.5*0.846*(54-14)=12.5*40*0.846=500*0.846=423