题目内容
计算:
(1)
+3
-
(2)(2
-3
)×
(3)(
)2+(
)2.
(1)
| 9 |
| 27 |
| 48 |
(2)(2
| 12 |
|
| 6 |
(3)(
| ||
| 2 |
| ||
| 2 |
(1)原式=3+9
-4
=3+5
;
(2)原式=2
-3
=12
-3
;
(3)原式=
+
=
+
=3.
| 3 |
| 3 |
=3+5
| 3 |
(2)原式=2
| 12×6 |
|
=12
| 2 |
| 3 |
(3)原式=
(
| ||
| 4 |
(
| ||
| 4 |
=
6-2
| ||
| 4 |
6+2
| ||
| 4 |
=3.
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