Question

上面的就可以了，简便运算，数学！！！

Answer 1

=(4/7+3/7)乘4/17
=1乘4/17
=4/17

=(31-1)乘5/6
=30乘5/6
=25

追问

恩

继续

追答

=(18+1)乘5/6
=15+5/6
=80/6+5/6
=85/6

追问

，

追答

==(18+1)乘5/6
=15+5/6
=90/6+5/6
=95/6

=（101-21）×1/5
=80×1/5
=16

=9/7-2/7+10/21
=1+10/21
=31/21