1、有理数a,b,c为何数时,式子a×b×c=|a×b×c|成立?2、某超市以50元进了A,B两种商品,然后以A商品提价20%,B商品降价10%出售,在某一天中,A商品10件,B商品20件,问这一天里超市做这两种买卖是赚了还是
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![1、有理数a,b,c为何数时,式子a×b×c=|a×b×c|成立?2、某超市以50元进了A,B两种商品,然后以A商品提价20%,B商品降价10%出售,在某一天中,A商品10件,B商品20件,问这一天里超市做这两种买卖是赚了还是](/uploads/image/z/10298161-1-1.jpg?t=1%E3%80%81%E6%9C%89%E7%90%86%E6%95%B0a%2Cb%2Cc%E4%B8%BA%E4%BD%95%E6%95%B0%E6%97%B6%2C%E5%BC%8F%E5%AD%90a%C3%97b%C3%97c%3D%7Ca%C3%97b%C3%97c%7C%E6%88%90%E7%AB%8B%3F2%E3%80%81%E6%9F%90%E8%B6%85%E5%B8%82%E4%BB%A550%E5%85%83%E8%BF%9B%E4%BA%86A%2CB%E4%B8%A4%E7%A7%8D%E5%95%86%E5%93%81%2C%E7%84%B6%E5%90%8E%E4%BB%A5A%E5%95%86%E5%93%81%E6%8F%90%E4%BB%B720%25%2CB%E5%95%86%E5%93%81%E9%99%8D%E4%BB%B710%25%E5%87%BA%E5%94%AE%2C%E5%9C%A8%E6%9F%90%E4%B8%80%E5%A4%A9%E4%B8%AD%2CA%E5%95%86%E5%93%8110%E4%BB%B6%2CB%E5%95%86%E5%93%8120%E4%BB%B6%2C%E9%97%AE%E8%BF%99%E4%B8%80%E5%A4%A9%E9%87%8C%E8%B6%85%E5%B8%82%E5%81%9A%E8%BF%99%E4%B8%A4%E7%A7%8D%E4%B9%B0%E5%8D%96%E6%98%AF%E8%B5%9A%E4%BA%86%E8%BF%98%E6%98%AF)
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