在学过了有关“偶数、奇数、质数、合数”的知识后,我们常常会遇见这样的问题:把下面的数分为两类,可以怎样分?2 15 3 19 23 44 60 71 37 38 40【思路点睛】题中共有11个数,要对这11个数进行分类,我们既可以按照“偶数与奇数”来分类,也可以按照“质数与合数”来分类,标准不同,得到的结果也不同。比如,按照“偶数与奇数”(即是否是2的倍数)来分类,则上面 After we have learned about “even, odd, prime, combined ”, we often encounter the following question: How can we divide the following into two categories? 2 15 3 19 23 44 60 71 37 38 40 【Ideas Dotting】 There are 11 numbers in the question. To classify these 11 numbers, we can classify them according to “Even and Odd Numbers” or “Quality and Algebra” Different standards, the results obtained are different. For example, according to “Even and Odd ” (that is, whether it is a multiple of 2) to classify, then