题目内容
99
×25.
| 99 |
| 105 |
99
×25,
=(100-
)×25,
=100×25-
×25,
=2500-
,
=2498
.
| 99 |
| 105 |
=(100-
| 6 |
| 105 |
=100×25-
| 6 |
| 105 |
=2500-
| 10 |
| 7 |
=2498
| 4 |
| 7 |
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题目内容
| 99 |
| 105 |
| 99 |
| 105 |
| 6 |
| 105 |
| 6 |
| 105 |
| 10 |
| 7 |
| 4 |
| 7 |