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今日の計算 答え
【解説】999×999=(1000−1)×(1000−1)=1000×1000−2×1000×1+1×1=1000000−2000+1=998001
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【解説】999×999=(1000−1)×(1000−1)=1000×1000−2×1000×1+1×1=1000000−2000+1=998001
Copyright © ITmedia, Inc. All Rights Reserved.