53×57-47×43 简便算法...麻烦具体点...
来源：学生作业帮助网 编辑：六六作业网 时间：2024/12/25 10:00:03
53×57-47×43简便算法...麻烦具体点...53×57-47×43简便算法...麻烦具体点...53×57-47×43简便算法...麻烦具体点...53×57-47×43=53×57-(57-
53×57-47×43 简便算法...麻烦具体点...
53×57-47×43 简便算法...
麻烦具体点...
53×57-47×43 简便算法...麻烦具体点...
53×57-47×43
=53×57-(57-10)×43
=53×57-57×43+10×43
=57×(53-43)+10×43
=(57-43)×10
=140
(47+10)*(43+10)-47×43
=47*43+47*10+10*43+10*10-47*43
=47*10+10*43+10*10
=(47+43)*10+100
=900+100
=1000