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批踢踢實業坊 ask 板

[請問] 一個機智問答

Nov 11th 2013, 14:57, by datour

作者datour (當我們早睡早起)

看板ask

標題[請問] 一個機智問答

時間Mon Nov 11 14:57:23 2013

跟爸爸借了500，跟媽媽借了500，買了雙皮鞋用了970。剩下30元，還爸爸10元，還媽媽10元，自己剩下10元。欠爸爸490，欠媽媽490，490+490=980。加上自己的10元=990。還有10元去那裡了？？ -- Sent from my Android -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 180.204.28.177

推 Workforme:就是算錯啊 ┐(─＿─)┌ 老問題了 11/11 14:59

→ varicosis:欠錢980，加自己10元，這算式並無意義 11/11 15:00

→ varicosis:欠錢980=皮鞋970+手頭10元 11/11 15:01

→ varicosis:加法的邏輯不明造成的 11/11 15:02

推 elizas1201:這題目就是故意混淆你的思考而已.關鍵就是2樓第1行推文 11/11 15:11

推 jimmily:同三樓，980本身已經有剩下的10元了 11/11 15:16

→ jimmily:你應該是要把還回去的20拿回來，980+20才對 11/11 15:16

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