8/100 5/2 3/4 7/15 18/50 5/14按大到小排
0 1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19 20 30 40 50 6
1,2,3,4,5,6,7,8,9,11,12,13,14,15,16,17,18,19,20,30,40,50,60,
1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,30,40,50,
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 30 40 50
2/5+1/4+3/8 11/9-2/7-5/7 11/25+(1/12+14/25) 15/18-(15/18-11/
1到100英语单词1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
1+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19.+100
100-1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18-19-20怎样简便计算
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20.+100=?要有步
1+2-3+4-5+6-7+8-9+10-11+12-13+14-15+16-17+18-19+20……-99+100
1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20.+100=
将自然数1~100排列如下 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1