亲.四道数学题.马上就得交.

问题描述:

亲.四道数学题.马上就得交.
(1又1/3+1/8-2.75)x(-24)-|-2|^3
(-7/30)÷(3/5-1/6+2/3
-7÷5/9x(-2/3)^2x(-2)^2
-1^4-1/6x[2-(-3)^2]

1、原
=-24(4/3+1/8-9/4)+8
=24×19/24+8
=27
2、原
=-7/30÷(18-5+20/30)
=-7/30÷11/10
=-7/33
3、原
=-7×9/5×4/9×4
=-112/5
4、原
=-1-1/6×(-7)
=1/6