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
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![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](/uploads/image/z/104320-64-0.jpg?t=%E4%B8%80%2C%E6%89%BE%E8%A7%84%E5%BE%8B%E5%A1%AB%E4%B8%80%E5%A1%AB+1.2%2C4%2C8%2C14%2C22%2C%E3%80%90+%E3%80%91%2C44%2C%E3%80%90+%E3%80%91%2C%E3%80%90+%E3%80%91%2C%E3%80%90+%E3%80%912.1%2C4%2C9%2C16%2C%E3%80%90+%E3%80%91%2C%E3%80%90+%E3%80%91%2C%E3%80%90+%E3%80%91%2C%E3%80%90+%E3%80%91%2C813.3%2C4%2C7%2C12%2C19%2C31%2C%E3%80%90+%E3%80%91%2C814.1%2C1%2C2%2C3%2C5%2C%E3%80%90+%E3%80%91%2C13%2C%E3%80%90+%E3%80%91%2C81%E4%BA%8C%2C%E5%A6%88%E5%A6%88%E4%B8%80%E6%AC%A1%E8%81%9A%E4%BC%9A%E4%B8%AD%E9%81%87%E8%A7%817%E4%B8%AA%E8%80%81%E6%9C%8B%E5%8F%8B%2C%E5%A5%B9%E4%BB%AC%E6%AF%8F%E4%BA%BA%E4%BA%92%E7%9B%B8%E6%8F%A1%E4%BA%86%E4%B8%80)
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
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?
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
答案:—、
1、2,4,8,14,22,32,44,58,74(每两个数之间相差为2,4,6,8,10,12,14.)
2、1,4,9,16,25,36,49,64,81(即n的平方)
3、3,4,7,12,19,31,50,81(第n个数等于前两个数得和)
4、1,1,2,3,5,8,13,21,34(这个题是不是有问题?那个81应该是34!)
二、1+3+4+5+6+7=26(一共有八个人,第一个人能与7个人握手,第二个能与6个,以此类推.)
1. 2,4,8,14,22,【32 】,44,【58 】,【74 】,【92 】
2. 1,4,9,16,【 25】, 【 36 】,【 49 】,【64 】,81
3. 3,4,7,12,19,31,【 50 】,81
4. 1,1,2,3,5,【 8 】,13,【 21 】,34
二,妈妈一次聚会中遇见7个老朋友,她们每人互相握了...
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1. 2,4,8,14,22,【32 】,44,【58 】,【74 】,【92 】
2. 1,4,9,16,【 25】, 【 36 】,【 49 】,【64 】,81
3. 3,4,7,12,19,31,【 50 】,81
4. 1,1,2,3,5,【 8 】,13,【 21 】,34
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?
1+2+...+6=28次
收起
2的答案:25、36、49、64
3的答案:50
4的答案:8、21
二 8X(8-1)÷2=28
2的答案:25、36、49、64
3的答案:50
4的答案:8、21
二、28次
1: 2,4,8,14,22,【32 】,44,【58 】,【74 】,【92 】
2: 1,4,9,16,【25】, 【 36 】,【 49 】,【64 】,81
3: 3,4,7,12,19,31,【 50 】,81
4: 1,1,2,3,5,【 8 】,13,【 21 】,34
二,1+2+...+6=28次