小学奥数题,待解决1、1-9中选8个数,不重复,使下面的等式成立.{( )()*()()+()()+()}*()=19902、1*2*3*.*100的末尾有多少个零?最好有点提示 3、从1-50取出若干个数,使其中任意两
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![小学奥数题,待解决1、1-9中选8个数,不重复,使下面的等式成立.{( )()*()()+()()+()}*()=19902、1*2*3*.*100的末尾有多少个零?最好有点提示 3、从1-50取出若干个数,使其中任意两](/uploads/image/z/1980832-40-2.jpg?t=%E5%B0%8F%E5%AD%A6%E5%A5%A5%E6%95%B0%E9%A2%98%2C%E5%BE%85%E8%A7%A3%E5%86%B31%E3%80%811-9%E4%B8%AD%E9%80%898%E4%B8%AA%E6%95%B0%2C%E4%B8%8D%E9%87%8D%E5%A4%8D%2C%E4%BD%BF%E4%B8%8B%E9%9D%A2%E7%9A%84%E7%AD%89%E5%BC%8F%E6%88%90%E7%AB%8B.%7B%EF%BC%88+%EF%BC%89%EF%BC%88%EF%BC%89%2A%EF%BC%88%EF%BC%89%EF%BC%88%EF%BC%89%2B%EF%BC%88%EF%BC%89%EF%BC%88%EF%BC%89%2B%EF%BC%88%EF%BC%89%7D%2A%EF%BC%88%EF%BC%89%3D19902%E3%80%811%2A2%2A3%2A.%2A100%E7%9A%84%E6%9C%AB%E5%B0%BE%E6%9C%89%E5%A4%9A%E5%B0%91%E4%B8%AA%E9%9B%B6%3F%E6%9C%80%E5%A5%BD%E6%9C%89%E7%82%B9%E6%8F%90%E7%A4%BA+3%E3%80%81%E4%BB%8E1-50%E5%8F%96%E5%87%BA%E8%8B%A5%E5%B9%B2%E4%B8%AA%E6%95%B0%EF%BC%8C%E4%BD%BF%E5%85%B6%E4%B8%AD%E4%BB%BB%E6%84%8F%E4%B8%A4)
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