题目内容
计算
(1)
-
-
+
(2)(3+2
)2-(4+
)(4-
)
(3)2
+4
-
-
.
(1)
12 |
27 |
48 |
50 |
(2)(3+2
5 |
7 |
7 |
(3)2
12 |
|
48 |
|
(1)原式=2
-3
-4
+5
=-5
+5
;
(2)原式=9+12
+20-(16-7)
=9+12
+20-9
=12
+20;
(3)原式=4
+
-4
-
=-
.
3 |
3 |
3 |
2 |
=-5
3 |
2 |
(2)原式=9+12
5 |
=9+12
5 |
=12
5 |
(3)原式=4
3 |
4
| ||
9 |
3 |
2
| ||
3 |
=-
32
| ||
9 |
练习册系列答案
相关题目