5/8+8/11+11/14+14/17+.+98/101=
5/8+8/11+11/14+14/17+.+98/101=
5*8+8*11+11*14……98*101
简算1/(5*8)+1/(8*11)+1/(11*14)+.+1/(95*98)+1/(98*101)=
5*8/1加8*11/1加11*14/1.加98*101/1 求巧算
简算:1\5*8+1\8*11+1\11*14+……+1\95*98+1\98*101
11+14+17+.+101
2+5+8+11+14+······98+101的简便计算
11/2*5+11/5*8+11/11*14+11/14*17
1/2*5+1/5*8+1/8*11+1/11*14+.+1/17*20=?
2/5 5/8 8/11 11/14 1 1/17=?
5*8/1+8*11/1+11*14/1+14*17/1+17*20/1=?怎样算
1/5*8+1/8*11+1/11*14+1/14*17+1/17*20=?怎样算