40一39十38一37十36一35+34一33+32一31+30一29+28一27十26一25+24一23+22一2|=
1个回答
40+【(38-39)+(36-37)+(34-35)+(32-33)+(30-31)+(28-29)+26-27)……
=40+(-11)
=29
相关问题
40-39+38-37+36-35+34-33+32-31+30-29+28-27+26-25+24-23+22-21
20*21*22*23*24*25*26*27*28*29*30*31*32*33*34*35*36*37*38*39*
50十49一48一47十46十45一44一43+42+41-40-39+38+37-36-35+34+33-32-31
22 31 33 34 35 41 32 28 29 26 23 25 27 31 36 37 24 30 31 29
29 34 26 31 37 30 31 29 28 40 36 32 30 27 33 32 37 31 35 30
31,37,35,29,35,29,38,40,32,33,38,39,37,38,30,38,36,39,35,36,
26 27 28 29 30 31 32 33 34 35
25+26+27+28+29+30+31+32+33+34+35简算
已知数据35,31,33,35,37,39,35,38,40,39,36,34,35,37,36,32,34,35,36
31 37 35 29 38 40 32 35 38 39 35 34 30 36 35 35 36 31这组数的平均数