题目内容
| 498×381+382 |
| 382×498-116 |
| 498×381+382 |
| 382×498-116 |
=
| 498×381+382 |
| (381+1)×498-116 |
=
| 498×381+382 |
| 381×498+498-116 |
=
| 381×498+382 |
| 381×498+382 |
=1.
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题目内容
| 498×381+382 |
| 382×498-116 |
| 498×381+382 |
| 382×498-116 |
| 498×381+382 |
| (381+1)×498-116 |
| 498×381+382 |
| 381×498+498-116 |
| 381×498+382 |
| 381×498+382 |