题目内容
计算:
(1)(
+
-
)×(-12)
(2)(-1)3×(-5)÷[(-3)2+2×(-5)].
(1)(
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 2 |
(2)(-1)3×(-5)÷[(-3)2+2×(-5)].
(1)原式=-
×12-
×12+
×12,
=-3-2+6
=1;
(2)原式=(-1)×(-5)÷[9-10]
=5÷[-1]
=-5.
| 1 |
| 4 |
| 1 |
| 6 |
| 1 |
| 2 |
=-3-2+6
=1;
(2)原式=(-1)×(-5)÷[9-10]
=5÷[-1]
=-5.
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