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数学
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求37×198的简便算法
人气:410 ℃ 时间:2020-05-12 21:07:23
解答
37x(100-2)=37x100-2x37=3700-74=3626看好题目,我说的是19837x(200-2)=37x200-2x37=7400-74=7326看错了 这回对了
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