题目内容
77×
-
．
| 77 |
| 76 |
| 1 |
| 76 |
77×
| 77 |
| 76 |
| 1 |
| 76 |
=（76+1）×
| 77 |
| 76 |
| 1 |
| 76 |
=76×
| 77 |
| 76 |
| 77 |
| 76 |
| 1 |
| 76 |
=77+
| 77 |
| 76 |
| 1 |
| 76 |
=77+（
| 77 |
| 76 |
| 1 |
| 76 |
=77+1，
=78．
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相关题目
77×
=（76+1）×
=76×
=77+
=77+（
=77+1，
=78．
每日10分钟口算心算速算天天练系列答案