负数

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(()(shù )()(shù ))

(xiǎo )()(líng )(de )(shù )()(shù )(zài )(shù )(qián )(jiā )()(hào )(lái )(biǎo )(shì )()-3,-5。

(máo )()(dōng )(máo )(dùn )(lùn )(sān ):“()()(shù )(xué )(zhōng )(de )(zhèng )(shù )()()(shù )()(xiè )(xué )(zhōng )(de )(zuò )(yòng )()(fǎn )(zuò )(yòng )……(dōu )(shì )(yīn )(wéi )()(yǒu )()(shū )(de )(máo )(dùn )()()(shū )(de )(běn )(zhì )(cái )(gòu )(chéng )(le )()(tóng )(de )()(xué )(yán )(jiū )(de )(duì )(xiàng )。”

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