75-(6.8+0.32*0.25*12.5)怎么简便运算?

来源:学生作业帮助网 编辑:六六作业网 时间:2024/07/08 20:34:48
75-(6.8+0.32*0.25*12.5)怎么简便运算?75-(6.8+0.32*0.25*12.5)怎么简便运算?75-(6.8+0.32*0.25*12.5)怎么简便运算?75-(6.8+0.

75-(6.8+0.32*0.25*12.5)怎么简便运算?
75-(6.8+0.32*0.25*12.5)怎么简便运算?

75-(6.8+0.32*0.25*12.5)怎么简便运算?
75-(6.8+0.32*0.25*12.5)
=75-(6.8+0.4*0.8*0.25*12.5)
=75-[6.8+(0.4*0.25)*(0.8*12.5)]
=75-[6.8+0.1*10]
=75-[6.8+1]
=75-7.8
=67.2

一楼出错了.应该是:75-(6.8+0.4*2.5*0.8*1.25)