1.-3-2x(-5) 2.8-(-6)x(-7+5) 3.7-24x(-1/3+5/6)

问题描述:

1.-3-2x(-5) 2.8-(-6)x(-7+5) 3.7-24x(-1/3+5/6)

1、
-3-2x(-5) 
=-3+10
=7


2.8-(-6)x(-7+5) 
=8+6x(-2)
=8-12
=-4




3.7-24x(-1/3+5/6)
=7-(-1/3x24+5/6x24)
=7-(-8+20)
=7-12
=-5