题干
化简 (a
b
)(−3a
b
)÷(
a
b
) 的结果是____．
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 6 |
| 5 |
| 6 |
答案(点此获取答案解析）
﹣9a
