100以内的合数是指除了1和它本身外还有其他因数的数。掌握这些数有助于快速判断质数与合数。以下为100以内合数的总结及表格:
| 合数列表(1-100) |
| 4, 6, 8, 9, 10 |
| 12, 14, 15, 16, 18 |
| 20, 21, 22, 24, 25 |
| 26, 27, 28, 30, 32 |
| 33, 34, 35, 36, 38 |
| 39, 40, 42, 44, 45 |
| 46, 48, 49, 50, 51 |
| 52, 54, 55, 56, 57 |
| 58, 60, 62, 63, 64 |
| 65, 66, 68, 69, 70 |
| 72, 74, 75, 76, 77 |
| 78, 80, 81, 82, 84 |
| 85, 86, 87, 88, 90 |
| 91, 92, 93, 94, 95 |
| 96, 98, 99, 100 |
通过顺口溜记忆,能更轻松掌握这些数字,提升数学学习效率。