题干
计算 (3x
y
)(−2x
y
)÷(6x
y
) ．
| 1 |
| 2 |
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 4 |
答案(点此获取答案解析）
解：原式=
| 3 |
| × |
| ( |
| − |
| 2 |
| ) |
| 6 |
