题目内容
计算或化简
(1)
-
-
(2)-
-2
(3)
+3
-5
(4)
(
-
)
(1)
|
| 0.52 |
| 3 | 8 |
(2)-
| (-81)2 |
| 3 | -83 |
(3)
| 2 |
| 2 |
| 2 |
(4)
| 6 |
| 1 | ||
|
| 6 |
(1)
-
-
,
=
-
-2,
=-2;
(2)-
-2
,
=-81-2×(-8),
=-81+16,
=-65;
(3)
+3
-5
,
=(1+3-5)
,
=-
;
(4)
(
-
),
=1-6,
=-5.
|
| 0.52 |
| 3 | 8 |
=
| 1 |
| 2 |
| 1 |
| 2 |
=-2;
(2)-
| (-81)2 |
| 3 | -83 |
=-81-2×(-8),
=-81+16,
=-65;
(3)
| 2 |
| 2 |
| 2 |
=(1+3-5)
| 2 |
=-
| 2 |
(4)
| 6 |
| 1 | ||
|
| 6 |
=1-6,
=-5.
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