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 |

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