题目内容
化简下列各题:
(1)(2
-3
)×
;
(2)
+6
-2x
;
(3)
-
+2
-
+
;
(4)(
)(
).
(1)(2
| 12 |
|
| 6 |
(2)
| 2 |
| 3 |
| 9x |
|
|
(3)
| 50 |
| 1 | ||
|
| 20 |
| 45 |
| ||
| 2 |
(4)(
| ||
| 2 |
| ||
| 2 |
(1)原式=(4
-
)×
=3
×
×
=9
;
(2)原式=2
+3
-2
=3
;
(3)原式=5
-
+4
-3
+
=
+
;
(4)原式=
[(
)2-1]=
×4=1.
| 3 |
| 3 |
| 6 |
| 3 |
| 3 |
| 2 |
| 2 |
(2)原式=2
| x |
| x |
| x |
| x |
(3)原式=5
| 2 |
| ||
| 5 |
| 5 |
| 5 |
| ||
| 2 |
11
| ||
| 2 |
4
| ||
| 5 |
(4)原式=
| 1 |
| 4 |
| 5 |
| 1 |
| 4 |
练习册系列答案
相关题目