6.25-0.625+3.75-0.375简算

问题描述:

6.25-0.625+3.75-0.375简算

6.25-0.625+3.75-0.375 =6.25+3.75-0.375-0.625 =(6.25+3.75)-(0.375+0.625) =10-1 =9