题目内容
计算
(1)
×
; (2)(
-2
)2; (3)
+
.
(1)
| 10 |
|
| 6 |
| 2 |
3-
| ||
|
|
(1)原式=
=
=
;
(2)原式=6-2
×2
+8
=14-8
;
(3)原式=
-
+
=
-
+
=
-
.
10×
|
=
|
=
| 2 |
| 3 |
(2)原式=6-2
| 6 |
| 2 |
=14-8
| 3 |
(3)原式=
| 3 | ||
|
| ||
|
| ||
| 2 |
=
| 3 |
2
| ||
| 3 |
| ||
| 2 |
=
| 3 |
| ||
| 2 |
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