题目内容
(-0.4)2008×(-2
)2009=______.
| 1 |
| 2 |
(-0.4)2008×(-2
)2009
=(-
)2008×(-
)2009
=(-
)2008×(-
)2008×(-
)
=[(-
)×(-
)]2008×(-
)
=-
.
| 1 |
| 2 |
=(-
| 2 |
| 5 |
| 5 |
| 2 |
=(-
| 2 |
| 5 |
| 5 |
| 2 |
| 5 |
| 2 |
=[(-
| 2 |
| 5 |
| 5 |
| 2 |
| 5 |
| 2 |
=-
| 5 |
| 2 |
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