200.5*0.1+2.005*490+0.2005*5000简便运算

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200.5*0.1+2.005*490+0.2005*5000简便运算200.5*0.1+2.005*490+0.2005*5000简便运算200.5*0.1+2.005*490+0.2005*500

200.5*0.1+2.005*490+0.2005*5000简便运算
200.5*0.1+2.005*490+0.2005*5000简便运算

200.5*0.1+2.005*490+0.2005*5000简便运算
原式=2005*0.01+2005*0.49+2005*0.5 =2005*(1) =2005