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(a+b)÷22=a÷22+b÷22=c...dd不等於0問題轉化為求1-2011這2011個自然數中有多少個數不能被22整除要求有多少個不能被22整除的數,換求有多少個能被22整除的數22×1=2222×2=44...22×91=200222×92=2024大於2011,不和...
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