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1一3的平方是一位數,占去3個位置;4-9的平方是二位數,占去12個位置;1O一31的平方是三位數,占去66個位置;32-99的平方是四位數,占去272個位置;將1到99的平方排成一行,共占去3+12+66+272=353個位置,從612-353=…
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