题目内容
计算:
(1)|1-
|+(-
)-1+
.
(2)(
+
)×(
-
)+(-
)0.
(1)|1-
| 2 |
| 1 |
| 2 |
| (-2)2 |
(2)(
| 5 |
| 3 |
| 5 |
| 3 |
| 1 | ||
|
(1)原式=
-1-2+2
=
-1;
(2)原式=(
)2-(
)2+1
=5-3+1
=3.
| 2 |
=
| 2 |
(2)原式=(
| 5 |
| 3 |
=5-3+1
=3.
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| 2 |
| 1 |
| 2 |
| (-2)2 |
| 5 |
| 3 |
| 5 |
| 3 |
| 1 | ||
|
| 2 |
| 2 |
| 5 |
| 3 |