题目内容
计算题:(每小题3分)
(1)
×
-
;
(2)2
-3
+(2
-1)2.
(1)
| 27 |
| 3 |
| ||||
|
(2)2
| 32 |
|
| 2 |
(1)原式=
-
=9-5
=4;
(2)原式=8
-
+9-4
=
+9.
| 27×3 |
3
| ||||
|
=9-5
=4;
(2)原式=8
| 2 |
3
| ||
| 2 |
| 2 |
=
5
| ||
| 2 |
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题目内容
| 27 |
| 3 |
| ||||
|
| 32 |
|
| 2 |
| 27×3 |
3
| ||||
|
| 2 |
3
| ||
| 2 |
| 2 |
5
| ||
| 2 |