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今日の計算 答え
【解説】99×99=(100−1)×(100−1)=100×100−2×100+1×1=10000−200+1=9801
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【解説】99×99=(100−1)×(100−1)=100×100−2×100+1×1=10000−200+1=9801
Copyright © ITmedia, Inc. All Rights Reserved.