6.66*1.25+2.5*33的简便运算

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6.66*1.25+2.5*33的简便运算

6.66*1.25+2.5*33的简便运算
6.66*1.25+2.5*33的简便运算

6.66*1.25+2.5*33的简便运算
提取1.25
1.25*(6.66+2*33)
不懂就问哈

1、0.4x(2.5-0.25)+2.9 =2.5*0.4-0.4*0.25+2.9 =1-0.1+2.9 =3.9-0.1 =3.8 2、1.25-1.25x0.8 =1.25*(1-0.8) =