(+71/4)-(+6.25)-(-17/2)-(+0.75)-89/4
问题描述:
(+71/4)-(+6.25)-(-17/2)-(+0.75)-89/4
答
(+71/4)-(+6.25)-(-17/2)-(+0.75)-89/4
=71/4-25/4+17/4-1/4-89/4
=(71-25+17-1-89)/4
=-27/4-27÷9/4×(-9/4)+4-4×(-3/1)要过程-27÷9/4×(-9/4)+4-4×(-3/1)=-27×4/9×(-9/4)+4-4×(-3/1) =27+4-3/4=31-3/4=29又3/2(-2/3)×1/2+(-1/3)+(-0.5)要过程(-2/3)×1/2+(-1/3)+(-0.5) =-1/3-1/3-1/2=-2/3-1/2=-7/6(2/3-1/4-3/8)×(-24)要过程(2/3-1/4-3/8)×(-24)=-2/3×24+1/4×24+3/8×24=-16+6+9=-1事不过三,再追问就要扣分了,有问题再发到网上啊