| 5 |
| 60 |
| 1 |
| 12 |
| 1 |
| 12 |
要想成直线,分针应追上时针5个小格,则追及时间为:
5÷(1-
| 1 |
| 12 |
=5÷
| 11 |
| 12 |
=5
| 5 |
| 11 |
即当7时5
| 5 |
| 11 |
当两针重合,分针则需要追35格,则追及时间为:
35÷(1-
| 1 |
| 12 |
=35÷
| 11 |
| 12 |
=38
| 2 |
| 11 |
即7时38
| 2 |
| 11 |
答:时针与分针成直线和重合的时刻分别是7时5
| 5 |
| 11 |
| 2 |
| 11 |
故答案为:7时5
| 5 |
| 11 |
| 2 |
| 11 |
| 5 |
| 60 |
| 1 |
| 12 |
| 1 |
| 12 |
| 1 |
| 12 |
| 11 |
| 12 |
| 5 |
| 11 |
| 5 |
| 11 |
| 1 |
| 12 |
| 11 |
| 12 |
| 2 |
| 11 |
| 2 |
| 11 |
| 5 |
| 11 |
| 2 |
| 11 |
| 5 |
| 11 |
| 2 |
| 11 |