Re: [閒聊] 還記得課本上什麼沒用的知識?
這真的要吐槽一下,最近六年級的孩子在上雞兔同籠,例:籠子裡有雞加兔共40隻,全部共144隻腳,請問雞、兔各幾隻?
當下直覺設未知數XY,但國小沒有未知數,所以是扣掉其中一種動物的腳再算出另一種動物數。
說實在的,實際算法我真的都還給老師了,等國中學會未知數後,我真的不知道原始解法的意義與用途在哪?
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