1/2+1/3+1/4+1/5+1/6简算方法

1/2+1/3+1/4+1/5+1/6简算方法 巧算：(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)===== (1+1/3)*(1+1/4)*(1+1/5)*(1+1/6) 怎么简算?今天我就要用的! 简算：1/1*2+1/2*3+1/3*4+1/4*5+1/5*6 ((1/2)-1)*((1/3)-1)*((1/4)-1)*((1/5)-1)*((1/6)-1)*((1/7)-1)*((1/8)-1)*((1/9)-1)*((1/10)-1) 1+1+1+1+11+-1-1-1-1-2-3-4-5-6等于 1-1/2+1/3-1/4+1/5-1/6+1/7.-1/50=? （1+2/1+3/1+4/1)×（2/1+3/1+4/1+5/1)－（1+2/1+3/1+4/1+5/1)×（2/1+3/1+4/1)如何简算（或计算）求帮忙 1+1+1+1+1+1+1+1+1+2+5+4+8+3+6+2+1+4等于多少? 1-1/2+1/3-1/4+1/5-1/6+…+1/15=23*[1/( )+1/( )+1/( )+1/( )] 数学简算1/2*3+1/3*4+1/4*5+...1/99*100 1/(2*3)+1/(3*4)+1/(4*5)+.+1/(2008*2009)如何简算 2:5/4 9/25:3/5 2/3:5/6 1/5:1/20 5/9:1 2:3/8 3/4:4/3化简比 (1+1/2)*(1+1/4)*(1+1/6)*.*(1+1/20)*(1-1/3)*(1-1/5)+(1-1/7)*.*(1-1/2 数学简算题,一定要简算,5/6+1/2*5/1215*1/6-4/15 线性代数,行列式化简,1 4 1 0 2 5 -1 3 1 0 -3 1 0 5 5 1 脱式计算（能简算得要简算）1/2+1/3+1/4+1/5+1/6+1/7+1/8=（ ） 问大家一个简算题,1/1*2+1/2*3+1/3*4+1/4*5+.+1/199*200