2,3,5,9,12,15,20,23,100,122的英语序数词!
来源:百度知道 编辑:UC知道 时间:2024/07/08 22:17:10
2,second
3,third
5,fifth
9,ninth
12,twelfth
15,fifteenth
20,twentieth
23,twenty-third
100,hundredth
122,one hundred and twenty-second
second
third
fifth
ninth
twelfth
fifteenth
twentieth
twenty-third
hundredth
one hundred and twenty-second
http://baike.baidu.com/view/210576.htm
这是个序数词用法和写法
观察下列算式:5^2-3^2=8*2;9^2-7^2=8*4;15^2-3^2=8*27;11^2-5^2=8*12;15^2-7^2=8*22……
5*5-3*3=8*2,9*9-7*7=8*4,15*15-3*3=8*27,11*11-5*5=8*12,15*15-7*7=8*22的规律
2,3,4,9,12,15,22,( )答案是多少
2 12 3 14 5 15 7 16 11 ( ? )
用英文怎样写1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
15^2-5^2=8*12
1 2/3 5/9 (?) 7/15 4/9 4/9
(1*2*3+3*6*9+5*10*15+7*14*21)/(1*3*5+3*9*15+5*15*25+7*21*35)
找规律:5^2-3^2=8*2, 9^2-7^2=8*4, 15^2-3^2=8*27
找规律5^2-3^2=8*2;9^2-7^2=8*4;15^2-3^2=8*27