1 8.7％×2.5+7.5×0.087
=0.087x(2.5+7.5)
=0.087x10
=0.87

2 （7/9+4/15-3/5)×4
=(35/45+12/45-27/45)x4
=4/9x4
=16/9

3 80％÷[62.5%×（1-20%）]
=0.8÷（0.625x0.8）
=0.8÷0.5
=1.6

4 5/6÷5/12+7/15×3/7
=2+1/5
=2.2

5 25%×3.7+7.3×1/4-25%
=0.25x(3.7+7.3-1)
=0.25x10
=2.5

6 （50％-37.5%）÷75%

=0.125÷0.75
=1/8÷3/4
=1/6你确定能简算的都简算了么 你几年级大学都毕业了，当然对简算的都简算了？是男的女的，是男的偶就叫叔叔，女的就叫阿姨都简算了，叫叔叔