题目内容
计算:
×(-
)÷3
.
| 2 |
| b |
| ab5 |
| 3 |
| 2 |
| a3b |
|
原式=
b2
×(-
a
)÷3
=2b
×(-
a
)×
=-a2b
.
| 2 |
| b |
| ab |
| 3 |
| 2 |
| ab |
| ||
| a |
=2b
| ab |
| 3 |
| 2 |
| ab |
| a | ||
3
|
=-a2b
| ab |
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题目内容
| 2 |
| b |
| ab5 |
| 3 |
| 2 |
| a3b |
|
| 2 |
| b |
| ab |
| 3 |
| 2 |
| ab |
| ||
| a |
| ab |
| 3 |
| 2 |
| ab |
| a | ||
3
|
| ab |