1/10+1/40+1/88+`````+1/460
1/10+1/40+1/88+1/154+1/238+1/340=
1-1/10+3-1/40+5-1/88+7-1/154+9-1/238+11-1/340
10/40+(1/40+1/80)(x-10)=1
(1) 88,24,56,40,48,( ),46应该如何填空?
1/55+1/66+1/77+1/88+1/99
5\1-10\1-20\1-40\1-80\1-160\1-360\1
(90+1/88)*1/89
(90+88/1)×89/1=?
简算(90+1/88)*1/98
(90+1/88)*1/89(简算)?
(90+1/88)*1/89=?
1/5+1/10+1/20+1/40+1/80+1/160.