答案
解:(1)原式=-16+23-17+7=30-33=-3;
(2)原式=-81×
×
×
=-1;
(3)原式=(-4)×(-2.5)×0.1×8×(-0.125)×10=-10;
(4)原式=-1-(-10+8)=-1-(-2)=-1+2=1;
(5)原式=(1-1+
)×(2-9)=-
;
(6)原式=(
-
-
)×(-
)+(-
)=-2+1+
-
=-2+1-2=-3.
解:(1)原式=-16+23-17+7=30-33=-3;
(2)原式=-81×
×
×
=-1;
(3)原式=(-4)×(-2.5)×0.1×8×(-0.125)×10=-10;
(4)原式=-1-(-10+8)=-1-(-2)=-1+2=1;
(5)原式=(1-1+
)×(2-9)=-
;
(6)原式=(
-
-
)×(-
)+(-
)=-2+1+
-
=-2+1-2=-3.