作者JI1 (HauHau)
看板Math
标题mathematics
时间Sun Dec 15 03:22:59 2019
1 + 2 = 3
3 + 9 = 12
2 + 6 = 8, 2 + 3 = 5, 6 + 9 = 15
1 + 3 = 4
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1F：→ JI1 : different 12/15 03:24