1-13=______，13-15=______，15-17=______，17-19=______，19-111=______．从上面的计算你发现了什么？用你的发现计算下题．23+215+235+263+299+2143．-数学
| 2 |
| 3 |
| 2 |
| 15 |
| 2 |
| 35 |
| 2 |
| 63 |
| 2 |
| 99 |
| 2 |
| 143 |
=（1-
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 7 |
| 1 |
| 7 |
| 1 |
| 9 |
| 1 |
| 9 |
| 1 |
| 11 |
| 1 |
| 11 |
| 1 |
| 13 |
=1-
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 7 |
| 1 |
| 11 |
| 1 |
| 13 |
=1-
| 1 |
| 13 |
=
| 2 |
| 13 |
故答案为：
| 2 |
| 3 |
| 2 |
| 15 |
| 2 |
| 35 |
| 2 |
| 63 |
