[求助] 兩數的差
各為大大你們好,近來教國ㄧ數學的時後,有時遇到題目問兩數的差,例如問甲乙兩數的差為多少,可是明明就是甲數較小,甲減乙為負數,可是答案卻用乙數減甲數,結果為正,差ㄧ定是正數嗎?請各位大大賜教,謝謝。
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