1/5-1/6 7/8-1/4

1、1/4*5+1/5*6+1/6*7+1/6*8+.+1/99*100 计算：1/3*4+1/4*5+1/5*6+1/6*7+1/7*8+1/8*9 1/4×5+1/5×6+1/6×7+1/7×8= 化简:1/1*2+1/2*3+1/3*4+1/4*5+1/5*6+1/6*7+1/7*8+1/8*9+1/9*10 1 2 3 4 5 6 7 8=1 1+1+2+3+4+5+6+7+8+9.99? 上面的分数是1/3,1/4,1/5,1/6,1/7,1/8 (1+1/2)*(1+1/4)*(1+1/6)*(1+1/8)*(1+1/3)*(1+1/5)*(1+1/7)*(1+1 英语翻译内容是：5 8 4 ,5 6 8 2 1 7 7 7 7 8 ,1 2 2 3 4 ,1 7 9 8 ,7 6 1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9.+1/999 求解答 1/2+1/3+1/4+1/5+1/6+1/7+1/8+1/9+1/10等于多少? 4/5+[7/8-4/5] 7/10-[2/15+1/6] 1-1/3-1/7 5/6+11/14 5/6-[4/9-1