题目内容
求下列各数的和:-
•(
)-1,|
|•(
)0,
.
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
|
由题意得:
-
•(
)-1+|
|•(
)0+
=-
×2+
×1+
=-1+
+
=-
+
.
-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
|
=-
| 1 |
| 2 |
| 1 |
| 2 |
| ||
| 2 |
=-1+
| 1 |
| 2 |
| ||
| 2 |
=-
| 1 |
| 2 |
| ||
| 2 |
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