1/42+1/56+1/72+1/90+1/110的计算过程及答案

来源：学生作业学帮网编辑：学帮网时间：2024/06/04 11:19:29

1/42+1/56+1/72+1/90+1/110
=（1/6-1/7）+（1/7-1/8）+（1/9-1/10）+（1/10-1/11）
=1/6-1/11
=11/66-6/66
=5/66

1/42+1/56+1/72+1/90+1/110
=(1/6-1/7)+(1/7-1/8)+(1/8-1/9)+(1/9-1/10)+(1/10-1/11)
=1/6-1/11
=5/66