Question

一些数学练习题,请将算式列出来,

Answer 1

1 原式=(1-1/2)+(1/2-1/3)+(1/3-1/4)+(1/4-1/5)+(1/5-1/6)+(1/6-1/7)+(1/7-1/8)=1-1/8=7/8

2 (1-7/15)/(7/15-5/11)

=8/15/(2/165)

=4*11=44(人)