12.5加87.5除以1.25怎么简便?

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/26 14:53:39
12.5加87.5除以1.25怎么简便?
x)343}ڵ\%Ov/532}dgu OI*'F~ IiR ah` bYa,i0-|<;6`HP$khmn- pp=Ij`iBԙ

12.5加87.5除以1.25怎么简便?
12.5加87.5除以1.25怎么简便?

12.5加87.5除以1.25怎么简便?
12.5+87.5÷1.25
=12.5+(100-12.5)x4/5
=12.5+80-10
=82.5

12.5÷1.25+87.5÷1.25=10+70=80

12.5加87.5除以1.25?
=12.5+(87.5+12.5-12.5)除以4分之5
=12.5+(100-12.5)除以4分之5
=12.5+100除以4分之5-12.5除以4分之5
=12.5+100x5分之4-12.5x5分之4
=12.5+20x4-2.5x4
=12.5+80-10
=82.5


...

全部展开

12.5加87.5除以1.25?
=12.5+(87.5+12.5-12.5)除以4分之5
=12.5+(100-12.5)除以4分之5
=12.5+100除以4分之5-12.5除以4分之5
=12.5+100x5分之4-12.5x5分之4
=12.5+20x4-2.5x4
=12.5+80-10
=82.5


(12.5+87.5)除以1.25?
=(100)除以4分之5
=100x5分之4
=20x4
=80

收起