题目内容
计算题
(1)-21-12+33+12-67
(2)(
-
+
-
)÷(-
)
(3)48÷[(-2)3-(-4)]
(4)(-1)3×(-5)÷[(-3)2+2×(-5)].
(1)-21-12+33+12-67
(2)(
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 12 |
| 1 |
| 36 |
(3)48÷[(-2)3-(-4)]
(4)(-1)3×(-5)÷[(-3)2+2×(-5)].
(1)原式=(-21-12-67)+(33+12)
=-110+45
=-55;
(2)原式=(
-
+
-
)×(-36)
=-18+27-30+21
=0;
(3)原式=48÷(-8+4)
=48÷(-4)
=-12;
(4)原式=-1×(-5)÷(9-10)
=-1×(-5)÷(-1)
=-5.
=-110+45
=-55;
(2)原式=(
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 12 |
=-18+27-30+21
=0;
(3)原式=48÷(-8+4)
=48÷(-4)
=-12;
(4)原式=-1×(-5)÷(9-10)
=-1×(-5)÷(-1)
=-5.
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