7.2-7.2*0.72-7.2*0.27如何巧算?

来源:学生作业帮助网 编辑:作业帮 时间:2024/04/30 08:23:36
7.2-7.2*0.72-7.2*0.27如何巧算?

7.2-7.2*0.72-7.2*0.27如何巧算?
7.2-7.2*0.72-7.2*0.27
如何巧算?

7.2-7.2*0.72-7.2*0.27如何巧算?
7.2-7.2× 0.72-7.2× 0.27
=7.2× (1-0.72-0.27)
=7.2× 0.01
=0.072

7.2*(1-0.72-0.27)=7.2*0.01=0.072

7.2-7.2*0.72-7.2*0.27
=7.2*1-7.2*0.72-7.2*0.27
=7.2*(1-0.72-0.27)
=7.2*0 .01
=0.072

7.2-7.2*0.72-7.2*0.27
=7.2*1-7.2*0.72-7.2*0.27
=7.2*(1-0.72-027)
=7.2*0
=0

7.2*(1-0.72-0.27)=7.2*0.01=0.072

=7.2-7.2(0.72-0.27)
=7.2-7.2*0.45
=7.2-3.24
=3.96