题目内容
(
-
-
)×(-48)
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(
-
-
)×(-48),
=
×(-48)-
×(-48)-
×(-48),
=-32+12+18,
=-32+30,
=-2.
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 8 |
=
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 8 |
=-32+12+18,
=-32+30,
=-2.
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