| Lane | # | Athlete | Age | Team | Seed | Note |
|---|---|---|---|---|---|---|
| 2 | 91 | LI, JIAWEI EMMA | 16 | JS Athletics | NT | |
| 3 | 107 | LOW, CALYNE | 15 | Maxform | 1:12.00 | |
| 4 | 427 | YITONG, CHIA | 17 | Swift | 1:12.60 | |
| 5 | 586 | TOH, ISABEL | 15 | Wings Athletics Club | NT |
| Lane | # | Athlete | Age | Team | Seed | Note |
|---|---|---|---|---|---|---|
| 2 | 375 | MUAMMAR GADAFI, SITI NURHIDAYAH | 15 | Singapore Sports School | 1:06.00 | |
| 3 | 365 | JAIGANTH, LAAVINIA | 16 | Singapore Sports School | 1:02.00 | |
| 4 | 447 | CHEW, KIMBERLY | 15 | Team Cicada Trackers | 1:05.00 | |
| 5 | 425 | PEREIRA, DAVINA | 15 | Swift | 1:08.00 |