从1,2,3,4,……中选出一些数。+C7K/w9F(p1L+r:u.P'x4u-r;|
(1)从1开始,每隔两个数选一个数,共选出6个。3o0x2j8K'S*A+C7K/w9F(p1L+r:u.P'x4u-r;|
算式:提示:N8D*_2q2E+C7K/w9F(p1L+r:u.P'x4u-r;|
(2)从1开始,每隔五个数选一个数,共选出6个。9i([+e3R5k;L;_)m(I,W1\+C7K/w9F(p1L+r:u.P'x4u-r;|
算式:提示8n't8G*i4F(L0i0\/H:l7v5n5}5V+C7K/w9F(p1L+r:u.P'x4u-r;|