9.625除以2又3/2-4又8/5*8/3

问题描述:

9.625除以2又3/2-4又8/5*8/3

9.625除以2又3/2-4又8/5*8/3
=73/8除以7/2-28/5*8/3
=73/28-224/15
=(1095-6272)/420
=-5177/420
=-12又137/420