1/3*4+1/4*5+1/5*6+1/6*7+.1/99*100=?
1/3*4+1/4*5+1/5*6+1/6*7+.1/99*100=?
1/3*4+1/4*5+1/5*6+1/6*7+……+1/99*100=?求规律!
1、1/4*5+1/5*6+1/6*7+1/6*8+.+1/99*100
1 +(-2/1)+3+(4/1)+5+(6/1)+7+(8/1)+.+99+(-100/1)=大神们帮帮忙
1+(-2)+3+(-4)+5+(-6)+7+(-8).+99+(-100)
1+2-3+4-5+6-7+.+98-99+100
1+2-3+4-5+6-7+^+98-99+100
1+1+2+3+4+5+6+7+8+9……+99+100=
六年级数学题/(1*2)+1/(2*3)+1/(3*4)+1/(4*5)+1/(5*6)+.+1/(99*100)=?
1+2+3+4+5+6~+99+100+101=?
1+2+3+4+5+6+""""+98+99+100=?
(2+4+6+8.+100)-(1+3+5+.+99)=?