题目内容
计算:
(1)(
-2)2003(
+2)2004;
(2)
+(
+1)(
-1);
(3)(
+
)2-
;
(4)
-
+
-
.
(1)(
| 3 |
| 3 |
(2)
| ||||
|
| 3 |
| 3 |
(3)(
| 2 |
| 5 |
| 40 |
(4)
| 3 |
| ||
| 36 |
| 0.01 |
| 1 | ||
|
(1)原式=[(
-2)(
+2)]2003×(
+2)=-
-2;
(2)原式=3-
+3-1=5-
;
(3)原式=7+2
-2
=7;
(4)原式=
-6+
-
=-
-
.
| 3 |
| 3 |
| 3 |
| 3 |
(2)原式=3-
| 2 |
| 2 |
(3)原式=7+2
| 10 |
| 10 |
(4)原式=
| 1 |
| 2 |
| 1 |
| 10 |
| ||
| 2 |
| 27 |
| 5 |
| ||
| 2 |
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