41.2*8.1+21*9.25+537*0.19

来源:学生作业帮助网 编辑:六六作业网 时间:2024/10/05 13:55:45
41.2*8.1+21*9.25+537*0.1941.2*8.1+21*9.25+537*0.1941.2*8.1+21*9.25+537*0.1941.2*8.1+21*9.25+537*0.19

41.2*8.1+21*9.25+537*0.19
41.2*8.1+21*9.25+537*0.19

41.2*8.1+21*9.25+537*0.19
41.2*8.1+21*9.25+537*0.19
=41.2*8.1+21*9.25+(41.2+12.5)*1.9
=41.2*(8.1+1.9)+10.5*19.5+12.5*1.9
=412+21*(10-0.75)+12.5*(2-0.1)
=412+210-15.75+25-1.25
=647-17
=630

638.325

用计算器直接乘再加