题目内容
计算题:
①(2
+
)(2
-
)
②
×
-3
÷
.
①(2
| 3 |
| 6 |
| 3 |
| 6 |
②
| 12 |
|
| 2 |
| 1 |
| 3 |
| 3 |
(1)原式=(2
)2-(
)2=12-6=6;
(2)原式=2
×
-3
×
=
-3
=-2
.
| 3 |
| 6 |
(2)原式=2
| 3 |
| ||
| 2 |
| 2 |
| 3 |
=
| 6 |
| 6 |
=-2
| 6 |
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题目内容
| 3 |
| 6 |
| 3 |
| 6 |
| 12 |
|
| 2 |
| 1 |
| 3 |
| 3 |
| 3 |
| 6 |
| 3 |
| ||
| 2 |
| 2 |
| 3 |
| 6 |
| 6 |
| 6 |