题目内容
计算:(每题至少写两步)
(1)-12+(-2)3×
-
×(-
)
(2)(3
+2
)(3
-2
)
(1)-12+(-2)3×
| 1 |
| 8 |
| 3 | -27 |
|
(2)(3
| 2 |
| 3 |
| 2 |
| 3 |
(1)原式=-1-8×
-(-3)×(-
)=-1-1-1=-3;
(2)原式=(3
)2-(2
)2=18-12=6.
| 1 |
| 8 |
| 1 |
| 3 |
(2)原式=(3
| 2 |
| 3 |
练习册系列答案
相关题目