1/11+2/22+3/33+4/44+5/55+6/66+7/77+8/88+9/99-10/100+11/110+12/120/13/130=
问题描述:
1/11+2/22+3/33+4/44+5/55+6/66+7/77+8/88+9/99-10/100+11/110+12/120/13/130=
答
1/11+2/22+3/33+4/44+5/55+6/66+7/77+8/88+9/99-10/100+11/110+12/120/13/130=