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

问题描述:

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

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