1、The least number natural number whose digits sum equals 100,is______.2、The sequence 1/1,1/2,2/2,1/3,2/3,3/3,1/4,2/4,3/

问题描述:

1、The least number natural number whose digits sum equals 100,is______.2、The sequence 1/1,1/2,2/2,1/3,2/3,3/3,1/4,2/4,3/4,4/4,1/5,2/5……then the 2007th number is ________.What the sum of these 2007 numbers?
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6456456过程?不知道!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!