题目内容
化简
①
-
×
②(
-
)2
③
+2
④
+
×
+|
-2|-(
)2.
①
| 18 |
| 3 |
| 27 |
②(
| 3 |
| 2 |
③
| ||||
|
|
④
| (-5)2 |
| 4 |
|
| 2 |
| 9 |
①原式=3
-
×3
=3
-9;
②原式=3-2×
×
+2
=5-2
;
③原式=
+
=3+
;
④原式=5+2×
+2-
-3
=5+
+2-
-3
=4.
| 2 |
| 3 |
| 3 |
=3
| 2 |
②原式=3-2×
| 3 |
| 2 |
=5-2
| 6 |
③原式=
2
| ||||
|
| 2 |
=3+
| 2 |
④原式=5+2×
| ||
| 2 |
| 2 |
=5+
| 2 |
| 2 |
=4.
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