答案
解:(1)原式=[(-3)+(-4)+(-11)]+9=-18+9=-9;
(2)原式=33.1-10.7+22.9-2.3=(33.1+22.9)-(10.7+2.3)=56-13=43;
(3)原式=(-60)×
-(-60)×
-(-60)×
=-40+5+4=-31;
(4)原式=(-81)×
×
×(-
)=
;
(5)原式=-1-1.5×
×(-
)=-1+0.125=-0.875;
(6)原式=(-8)+6+3-1=-2+3-1=0.
解:(1)原式=[(-3)+(-4)+(-11)]+9=-18+9=-9;
(2)原式=33.1-10.7+22.9-2.3=(33.1+22.9)-(10.7+2.3)=56-13=43;
(3)原式=(-60)×
-(-60)×
-(-60)×
=-40+5+4=-31;
(4)原式=(-81)×
×
×(-
)=
;
(5)原式=-1-1.5×
×(-
)=-1+0.125=-0.875;
(6)原式=(-8)+6+3-1=-2+3-1=0.