问题描述: 1到200中能被7整除或者含有7的自然数有多少 1个回答 分类:数学 2014-11-28 问题解答: 我来补答 能被7整除的:7,14,21,28,35,42,49,56,63,70,77,84,91,98,105,112,119,126,133,140,147,154,161,168,175,182,189,196 共有28个含7的:7,17,27,37,47,57,67,87,97,107,117,127,137,147,157,167,187,197,70,71,72,73,74,75,76,77,78,79,170,171,172,173,174,175,176,177,178,179共有38个因为7,70,77,147,175是重复的所以28+38-5=61个不一定对仅供参考 展开全文阅读