一,找规律填一填 1.2,4,8,14,22,【 】,44,【 】,【 】,【 】2.1,4,9,16,【 】,【 】,【 】,【 】,813.3,4,7,12,19,31,【 】,814.1,1,2,3,5,【 】,13,【 】,81二,妈妈一次聚会中遇见7个老朋友,她们每人互相握了一次手,一共握了几次手?

问题描述:

一,找规律填一填 1.2,4,8,14,22,【 】,44,【 】,【 】,【 】
2.1,4,9,16,【 】,【 】,【 】,【 】,81
3.3,4,7,12,19,31,【 】,81
4.1,1,2,3,5,【 】,13,【 】,81
二,妈妈一次聚会中遇见7个老朋友,她们每人互相握了一次手,一共握了几次手?