题目内容
计算:
(1)(
+
)(
-
)-(
-
)2
(2)(
-
)-(
-2
-
)
(3)6
(
-
)-2
.
(1)(
| 5 |
| 2 |
| 5 |
| 2 |
| 3 |
| 2 |
(2)(
|
| 48 |
| 0.5 |
|
| 32 |
(3)6
| 2 |
|
| 6 |
| 48 |
(1)原式=5-2-(3-2
+2)
=5-2-3+2
-2
=2
-2;
(2)原式=
-4
-
+
+4
=
-
;
(3)原式=6
-6
-8
=3-12
-8
=3-20
.
| 6 |
=5-2-3+2
| 6 |
=2
| 6 |
(2)原式=
| ||
| 4 |
| 3 |
| ||
| 2 |
2
| ||
| 3 |
| 2 |
=
| 15 |
| 4 |
| 2 |
| 10 |
| 3 |
| 3 |
(3)原式=6
2×
|
| 2×6 |
| 3 |
=3-12
| 3 |
| 3 |
=3-20
| 3 |
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