(-5/6+3/8)*(-24)-(-7)+(-0.75)*5/14用简便方法

问题描述:

(-5/6+3/8)*(-24)-(-7)+(-0.75)*5/14用简便方法

(-5/6+3/8)*(-24)-(-7)+(-0.75)*5/14
=-5/6*(-24)+(3/8)*(-24)+7-(3/4)*(5/14)
=20-9+7-(15/56)
=17又41/56这么回答,老师批错不然用这种(-5/6+3/8)*(-24)-(-7)+(-0.75)*5/14 =-5/6*(-24)+(3/8)*(-24)+7+(1/4-1)*5/14=20-9+7+(5/56)-(5/14)=18-(15/56)=17又41/56