题目内容
(
-
-
)×(-60)
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解;(
-
-
)×(-60),
=
×(-60)-
×(-60)-
×(-60),
=-40+5+4,
=-31.
| 2 |
| 3 |
| 1 |
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| 1 |
| 15 |
=
| 2 |
| 3 |
| 1 |
| 12 |
| 1 |
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=-40+5+4,
=-31.
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