(-1又3/4)+ ( 3又2/5)帮帮忙咯!觉得答案怎么看都不对!

(-1又3/4)+ ( 3又2/5)帮帮忙咯!觉得答案怎么看都不对!
(-1又3/4)+ ( 3又2/5)帮帮忙咯!觉得答案怎么看都不对!

(-1又3/4)+ ( 3又2/5)帮帮忙咯!觉得答案怎么看都不对!
(-1又3/4)+ ( 3又2/5)
=-1又3/4+3又2/5
=2又7/5-1又3/4
=1又13/20

(-1又3/4)+ ( 3又2/5)
=3+2/5-1-3/4
=2+8/20-15/20
=2-7/15
=1又8/15

二十分之三十三