题目内容
计算、化简
(1)
-
(2)(2-
)2-(1+
)(
-2)
(3)(π-2009)0+
+|
-2|
(4)(
-
)(
+
)+6
(5)2
×(3
-
-
)
(6)
-
.
(1)
3 | 27 |
| ||||
|
(2)(2-
5 |
5 |
5 |
(3)(π-2009)0+
12 |
3 |
(4)(
3 |
2 |
2 |
3 |
|
(5)2
3 |
75 |
12 |
27 |
(6)
20
| ||||
|
1 |
2 |
(1)原式=3-
=3-2
=1;
(2)原式=(2-
)[(2-
)+(1+
)]
=(2-
)×3
=6-3
;
(3)原式=1+2
+2-
=3+
;
(4)原式=1+2
;
(5)原式=2
×(15
-2
-3
)
=2
×10
=60;
(6)原式=
-
=
-
=
-
=11.
2
| ||
|
=3-2
=1;
(2)原式=(2-
5 |
5 |
5 |
=(2-
5 |
=6-3
5 |
(3)原式=1+2
3 |
3 |
=3+
3 |
(4)原式=1+2
6 |
(5)原式=2
3 |
3 |
3 |
3 |
=2
3 |
3 |
=60;
(6)原式=
20
| ||||
2
|
1 |
2 |
=
23
| ||
2
|
1 |
2 |
=
23 |
2 |
1 |
2 |
=11.
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