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錯分幾種情況若2:3則另一個比應為4:6或是5:15/2若2:4=1:2則另一個比應為3:6或是5:10若2:5則另一個比應為3:15/2或是4:10若3:4則另一個比應為2:8/3或是5:20/3若3:5則另一個比應為2:10/3或是4:20/3…
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