-|-11分之5|*|-0.25|-(-5又4分之1)*(+5分之11)

问题描述:

-|-11分之5|*|-0.25|-(-5又4分之1)*(+5分之11)

原式=-5/11*1/4+21/4*11/5
=-5/44+231/20
=-25/220+2541/220
=2516/220 =629/55
(2)原式=-11/5*1/4+21/4*11/5
=11/5(-1/4+21/4)
=11/5*5
=11