题目内容
计算题
(1)
•(-15)•(-
)
(2)(1-
)2-
+(
)0.
(1)
| 3 |
| 2 |
| 20 |
| 1 |
| 4 |
| 48 |
(2)(1-
| 2 |
| 3 | ||
|
| 2 | ||
|
(1)原式=3
×(-15)×(-
)
=45
;
(2)原式=1-2
+(
)2-3(
-1)+1
=1-2
+2-3
+3+1
=7-5
.
| 5 |
| 3 |
=45
| 15 |
(2)原式=1-2
| 2 |
| 2 |
| 2 |
=1-2
| 2 |
| 2 |
=7-5
| 2 |
练习册系列答案
相关题目