题目内容
(-
)2009×(-2
)2010=______.
| 5 |
| 13 |
| 3 |
| 5 |
(-
)2009×(-2
)2010
=(-
)2009×(-
)2010
=(-
)2009×(
)2010
=-(
)2009×(
)2010
=-(
)2009×(
)2009×
=-(
×
)2009×
=
.
| 5 |
| 13 |
| 3 |
| 5 |
=(-
| 5 |
| 13 |
| 13 |
| 5 |
=(-
| 5 |
| 13 |
| 13 |
| 5 |
=-(
| 5 |
| 13 |
| 13 |
| 5 |
=-(
| 5 |
| 13 |
| 13 |
| 5 |
| 13 |
| 5 |
=-(
| 5 |
| 13 |
| 13 |
| 5 |
| 13 |
| 5 |
=
| 13 |
| 5 |
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