题目内容
化简
①
+3
-5
②|
-
|+|
-2|-|
-1|
①
| 2 |
| 2 |
| 2 |
②|
| 3 |
| 2 |
| 3 |
| 2 |
①原式=(1+3-5)
=-
;
②原式=(
-
)+(2-
)-(
-1)
=
-
+2-
-
+1
=-2
+3.
| 2 |
=-
| 2 |
②原式=(
| 3 |
| 2 |
| 3 |
| 2 |
=
| 3 |
| 2 |
| 3 |
| 2 |
=-2
| 2 |
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