92934763572424646087388611094384*11*100*89*97
54*2+99*98+45*2分之100*89+100*99-89*11-89*89
100*89+100*99-89*11-89*89/54*2+99*98+45*2
97,86,100,95,100,96,89,97,99,100,95,98中位数是
98 86 92 89 94 100 100 98 96 97 96 98 86 80 91 89 93 100 85
54*2+98*99+45*2分之100*89+100*99-89*11-89*89/2002200220002分之20
83 82 98 65 96 88 95 89 88 75 84 93 78 97 75 88 97 69 99 100
1-3+5-7+9-11+...+97-99+100
100+99+98+97+96++95+94+93+92+91+90+89+88+87+86+85+84+83+82+8
91,97,94,96,95,93,95,100,92,99,93,89用简便方法计算平均数
1+2+3+4+5…+89+90+91+92+93+94+95+96+97+98+99+100=
81+82+83+84+85+86+87+88+89+90+91+92+93+94+95+96+97+98+99+100
89,10,11