题目内容
计算:
(1)
+
-
(2)|1-
|+|
-
|+|2-
|;
(3)(-2)3×
+
×(-
)2-
.
(1)
|
| 0.52 |
| 3 | 8 |
(2)|1-
| 2 |
| 2 |
| 3 |
| 3 |
(3)(-2)3×
| (-4)2 |
| 3 | (-4)3 |
| 1 |
| 2 |
| 3 | 27 |
(1)原式=
+0.5-2
=1-2
=-1;
(2)原式=
-1+
-
+2-
=(
-
)+(-
+
)+(2-1)
=1;
(3)原式=-8×4+(-4)×
-3
=-32-1-3
=-36.
| 1 |
| 2 |
=1-2
=-1;
(2)原式=
| 2 |
| 3 |
| 2 |
| 3 |
=(
| 2 |
| 2 |
| 3 |
| 3 |
=1;
(3)原式=-8×4+(-4)×
| 1 |
| 4 |
=-32-1-3
=-36.
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