题目内容
计算题(每小题4分,共32分)
⑴ —54×2
÷(—4
)×
⑵(
—
+
)×(—36)
⑶ —4×7—(—3)×6+5 ⑷ —1—〔1—(1—0.5×
)〕×6
(5)
(6) 
(7).(-1)+(-1)
+(-1)
+…+(-1)
+(-1)
(8).
⑴ —54×2
⑶ —4×7—(—3)×6+5 ⑷ —1—〔1—(1—0.5×
(5)
(7).(-1)+(-1)
(1)6; (2)-19; (3)-5; (4)-2;
(5)24; (6)90 (7) 0 (8)
(5)24; (6)90 (7) 0 (8)
解:(1)-54×2
÷(-4
)×
=54×
×
×
=6;
(2)(
-
+
)×(-36)
=-18+20-21
=-19;
(3)-4×7-(-3)×6+5
=-28+18+5
=-5;
(4)-1-[1-(1-0.5×
)]×6
=-1-[1-(1-
×
)]×6
=-1-6+6-
×
×6
=-1-6+6-1
=-2;
(5)-22-(-3)3×(-1)4-(-1)5
=-4+27×1+1
=-4+27+1
=24;
(6)(-
)×(-4)2-0.25×(-5)×(-4)3
=-
×16-0.25×5×64
=-10-80
=-90;
(7)(-1)+(-1)2+(-1)3+…+(-1)99+(-1)100
=-1+1-1+…-1+1
=0;
(8)
+
+
=
)+
×(
-
)+
×(
-
)+…+
×(
-
)
=
×(
-
)
=
.
=54×
=6;
(2)(
=-18+20-21
=-19;
(3)-4×7-(-3)×6+5
=-28+18+5
=-5;
(4)-1-[1-(1-0.5×
=-1-[1-(1-
=-1-6+6-
=-1-6+6-1
=-2;
(5)-22-(-3)3×(-1)4-(-1)5
=-4+27×1+1
=-4+27+1
=24;
(6)(-
=-
=-10-80
=-90;
(7)(-1)+(-1)2+(-1)3+…+(-1)99+(-1)100
=-1+1-1+…-1+1
=0;
(8)
=
=
=
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