(1/2+1/3+1/4+…+1/59+1/60)+(2/3+2/4+2/5+…+2/59+2/60)+(3/4+3/5
(1/2+1/3+1/4+…+1/59+1/60)+(2/3+2/4+2/5+…+2/59+2/60)+(3/4+3/5
1/2+1/3+2/3+1/4+2/4+3/4+1/5+……+1/60+2/60+……+59/60
计算:1/2+1/3+2/3+1/4+2/4+3/4+1/5+2/5+3/5+4/5+……+1/6+…+59/60
(1+1/2+1/3+……+1/60)+(2/3+2/4+……+3/60)+……+(58/59+58/60)+1/60
1/2+(1/3+2/3)+(1/4+2/4+3/4)+…+(1/60+2/60+…58/60+59/60)简便算法
(1/2+1/3+1/4+……+1/60)+(2/3+2/4+2/5+……+2/60)+……+(58/59+58/60)
一道数学简便计算题(1/2+1/3+1/4+...+1/59+1/60)+(2/3+2/4+2/5+...2/59+2/
1+2-3+4+5-6+7+.+58+59-60
简便计算:1-2+3-4+5-6+...+59-60
简便计算:1-2+3-4+5-6...+59-60
计算1+2-3+4+5-6+7+8-9…+58+59-60.
(1/2+1/3+1/4+.+1/60)+(2/3+2/4+2/5+.+2/60)+.+(58/59+58/60)+59