64+70+83+84+93+67+83+71+73+78+78
1+2.....+68+69+70+71+72+73+74+75+76+77+78+79+80+81+82+83+84+
1+2.+68+69+70+71+72+73+74+75+76+77+78+79+80+81+82+83+84+85+8
22 13 47 39 56 19 21 73 69 78 53 63 77 97 43 71 17 59 91 83
73,83,78怎么写?分别都要有理由.
83 82 98 65 96 88 95 89 88 75 84 93 78 97 75 88 97 69 99 100
83+78+80+77+84+79的简便计算是
78+77+76-75-74-73+72+71+70-69-68-67+.+6+5+4-3-2
计算:83+82+78+79+80+81+78+79+77+84.
巧算题,83+82+78+79+80+81+78+79+77+84
68 80 78 79 78 84 81 83 77 92的中位数
21,13,17,24,2,31,43,37,67,73,41,15,83,93,27,61,73,11,57,99
83 89 81 55 62 70 78 94 84 97 86 100 66 75 优秀率(80分以上)是百分之几?急