21+41+51+31+81+61+71+91+32+42+52+62+72+82+92+43+53+63+73+83+
21+41+51+31+81+61+71+91+32+42+52+62+72+82+92+43+53+63+73+83+
31*51,41*61,81*21,91*31,71*41,81*81的简便算法
21 31 41 51 61 71 81 91 100的英语怎么写
1+11+21+31+41+51+61+71+81+91=
12,13,14,15,21,23,24,25,31,32,34,35,41,42,43,45,51,52,53,54
1+11+21+31+41+51+61+71+81+9
22 13 47 39 56 19 21 73 69 78 53 63 77 97 43 71 17 59 91 83
excel排序.1-100,就要求,这样排序1,21,31,41,51,61,71,81,91,101,111,
11*19+21*29+31*39+41*49+51*59+61*69+71*79+81*89+91*99 = 3308
我有59 80 73 75 63 61 72 64的一分 63 74 83 81 88的二分 74 56 82 92的五
21 26 28 41 51 55 61 69 71 73 79 91谁是素数谁是合数
11,21,31,41,51,61,71,81,91.合数有哪些