题目内容
计算:
(1)
-
+
-
(2)(4+2
)(4-
)
(3)
-(
-2
)
(4)
[(
)2-(
)2]
(1)
| 75 |
| 108 |
| 54 |
| 3 |
(2)(4+2
| 3 |
| 3 |
(3)
| 1 |
| 8 |
| 48 |
| 2 |
| 3 |
4
|
|
(4)
|
| ||
| 2 |
| ||
| 2 |
(1)原式=5
-6
+3
-
=3
-2
;
(2)原式=16-4
+8
-2
•
=10+4
;
(3)原式=
×4
-(
•
-2•
)
=
-
;
(4)原式=
[(
+
)(
-
)]
=
•
=1.
| 3 |
| 3 |
| 6 |
| 3 |
=3
| 6 |
| 3 |
(2)原式=16-4
| 3 |
| 3 |
| 3 |
| 3 |
=10+4
| 3 |
(3)原式=
| 1 |
| 8 |
| 3 |
| 2 |
| 3 |
|
| ||
| 2 |
=
3
| ||
| 2 |
| 2 |
(4)原式=
| ||
| 5 |
| ||
| 2 |
| ||
| 2 |
| ||
| 2 |
| ||
| 2 |
=
| ||
| 5 |
| 5 |
=1.
练习册系列答案
相关题目