题目内容
化简-
÷
=______．
| 15 |
| 8 |
2
|
|
原式=-
•
=-
•
=-
•
•
=-2a
．
| 15 |
| 8 |
|
|
=-
| 15 |
| 8 |
| ||
|
| ||
|
=-
| 15 |
| 8 |
| 8 | ||
3
|
2a
| ||
| 5 |
=-2a
| a |
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| 15 |
| 8 |
2
|
|
| 15 |
| 8 |
|
|
| 15 |
| 8 |
| ||
|
| ||
|
| 15 |
| 8 |
| 8 | ||
3
|
2a
| ||
| 5 |
| a |
阅读快车系列答案