分析:(1)3-1=2,5-3=2,7-3=2,依次增加2;
(2)2-1=1,4-2=2,7-4=3,依次增加1,2,3,…
(3)1:25-1:00=25(分),1:50-1:25=25(分),前一個(gè)時(shí)刻向后推算25分鐘就是后一個(gè)時(shí)刻;
(4)3=1+2,5=2+3,8=3+5,每一個(gè)數(shù)都是它前面兩個(gè)數(shù)的和.
解答:解:(1)7+2=9,
9+2=11,
11+2=13,
13+2=15,
15+2=17;
這個(gè)數(shù)列是:1,3,5,7,9,11,13,15,17.
(2)7+4=11,
驗(yàn)證:11+5=16,
16+6=22,
22+7=29,
驗(yàn)證29+8=37,
37+9=46;
這個(gè)數(shù)列是:1,2,4,7,11,16,22,29,37,46.
(3)1時(shí)50分+25分=2時(shí)15分,
2時(shí)15分+25分=2時(shí)40分,
2時(shí)40分+25分=3時(shí)05分,
3時(shí)05分+25分=3時(shí)30分;
這個(gè)數(shù)列是:1:00,1:25,1:50,2:15,2:40,3:05,3:30.
(4)5+8=13,
驗(yàn)證:8+13=21,
13+21=34,
21+34=55,
34+55=89
這個(gè)數(shù)列是:1,2,3,5,8,13,21,34,55,89.
故答案為:9,11,13,15,17; 11,22,29,46; 2:15,2:40,3:05,3:30; 13,34,55,89.
點(diǎn)評(píng):本題先找出各個(gè)數(shù)列的變化規(guī)律,再由規(guī)律進(jìn)行求解.