[猜謎] 減法
一則數學題
請問 40-25=?
Ans:689
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推
06/23 15:52, , 1F
06/23 15:52, 1F
推
06/23 15:56, , 2F
06/23 15:56, 2F
推
06/23 15:56, , 3F
06/23 15:56, 3F
→
06/23 15:56, , 4F
06/23 15:56, 4F
推
06/23 15:58, , 5F
06/23 15:58, 5F
→
06/23 16:18, , 6F
06/23 16:18, 6F
推
06/23 16:52, , 7F
06/23 16:52, 7F
推
06/24 23:53, , 8F
06/24 23:53, 8F