|-2又3/4|x|-2又2/15|

问题描述:

|-2又3/4|x|-2又2/15|

|-2又3/4|x|-2又2/15|
=2又3/4x2又2/15
=(8+3)/4x(30+2)/15
=11/4x32/15
=11x8/15
=88/15
=5又13/15