大家帮我看看这道题对么！！！！谢谢大家了

Question

计算
(1)9/-72=-(72÷9)=-8

(2)-45/-30=-(45÷30)=-3/2

(3)-75/0=0÷(-75)=0

(4)
(-36又11/9)÷9
=(-36+11/9)×9/1
=-36×9/1+11/9×9/1
=-4+11/1
=-(3又11/11-11/1)
=-(11/33-11/1)
=-11/32
=2又11/10
(5)
(-12)÷(-4)÷(-1又5/1)
=3÷(-5/6)
=3×(-6/5)
=-10
大家手做的对么？

Answer 1

对
以后二分之一不能写成2/1应写为1/2
错(-12)÷(-4)÷(-1又5/1)
=3÷(-5/6)
=3×(-6/5)
=-2又1/2（二分之一）

Answer 2

都不对
(1)9/-72=-(9÷72)=-1/8

(2)-45/-30=45÷30=3/2

(3)-75/0无意义

(4)
(-36又11/9)÷9
=(-36-11/9)×1/9
=-36×1/9-11/9×1/9
=-4-11/81
=-4又11/81
(5)
(-12)÷(-4)÷(-1又1/5)
=3÷(-6/5)
=3×(-5/6)
=-5/2

嗨,我刚才明白你连分数都写反了.
第二题不对,负数除以负数得正数
第四题
(-36又11/9)÷9
=-36*(1/9)-(9/11)*(1/9)
=-4-1/11
=-4又1/11
第五题
(-12)÷(-4)÷(-1又1/5)
=3÷(-6/5)
=3×(-5/6)
=-5/2