把自然数1,2,3,4,5……98,99分成三组,如果每组数的平均数刚好相等,那么此平均数为( )解法为:(1+2+3+.99)=49504950*3*33=50看不懂这个解法,
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![把自然数1,2,3,4,5……98,99分成三组,如果每组数的平均数刚好相等,那么此平均数为( )解法为:(1+2+3+.99)=49504950*3*33=50看不懂这个解法,](/uploads/image/z/394255-55-5.jpg?t=%E6%8A%8A%E8%87%AA%E7%84%B6%E6%95%B01%2C2%2C3%2C4%2C5%E2%80%A6%E2%80%A698%2C99%E5%88%86%E6%88%90%E4%B8%89%E7%BB%84%2C%E5%A6%82%E6%9E%9C%E6%AF%8F%E7%BB%84%E6%95%B0%E7%9A%84%E5%B9%B3%E5%9D%87%E6%95%B0%E5%88%9A%E5%A5%BD%E7%9B%B8%E7%AD%89%2C%E9%82%A3%E4%B9%88%E6%AD%A4%E5%B9%B3%E5%9D%87%E6%95%B0%E4%B8%BA%28+%29%E8%A7%A3%E6%B3%95%E4%B8%BA%EF%BC%9A%EF%BC%881%2B2%2B3%2B.99%EF%BC%89%3D49504950%2A3%2A33%3D50%E7%9C%8B%E4%B8%8D%E6%87%82%E8%BF%99%E4%B8%AA%E8%A7%A3%E6%B3%95%2C)
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