题目内容
(
-
-
+
)×48.
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原式=
×48-
×48-
×48+
×48
=32-12-18+10
=32+10-12-18
=12.
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 8 |
| 5 |
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=32-12-18+10
=32+10-12-18
=12.
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