| 19 |
| 20 |
则
| 1 |
| a |
| 1 |
| a+1 |
| 1 |
| a+2 |
| 1 |
| a+3 |
| 19 |
| 20 |
所以
| 19 |
| 20 |
| 1 |
| a |
| 1 |
| a+1 |
| 1 |
| a+2 |
| 1 |
| a+3 |
| 1 |
| a |
| 1 |
| a |
| 1 |
| a |
| 1 |
| a |
| 4 |
| a |
| 4 |
| 19 |
易知a=1,2,4均不合题意,故a=3,这四个自然数为3,4,5,6
其两两乘积之和为:3×4+3×5+3×6+4×5+4×6+5×6=119.
答:这四个自然数的两两乘积之和是119.
编辑:chaxungu时间:2026-04-27 14:05:12分类:小学数学题库
| 19 |
| 20 |
| 1 |
| a |
| 1 |
| a+1 |
| 1 |
| a+2 |
| 1 |
| a+3 |
| 19 |
| 20 |
| 19 |
| 20 |
| 1 |
| a |
| 1 |
| a+1 |
| 1 |
| a+2 |
| 1 |
| a+3 |
| 1 |
| a |
| 1 |
| a |
| 1 |
| a |
| 1 |
| a |
| 4 |
| a |
| 4 |
| 19 |