1\/1*2+1\/2*3+1\/3*4+.+1\/99*100怎样简便运算
1\/1*2+1\/2*3+1\/3*4+.+1\/99*100 =1\/1-1\/2+1\/2-1\/3+1\/3-1\/4+...+1\/99-1\/100 =1-1\/100 =99\/100 =100分之99 朋友,请采纳正确答案,你们只提问,不采纳正确答案,回答都没有劲!!!朋友,请【采纳答案】,您的采纳是我答题的动力,如果没有明白,请追问。谢谢。
1\/1*2+1\/2*3+1\/3*4+.+1\/99*100怎样简便运算
1\/1*2+1\/2*3+1\/3*4+.+1\/99*100 =1-1\/2+1\/2-1\/3+1\/3-1\/4+.+1\/99-1\/100 =1-1\/100 =99\/100
如何快速计算1\/1*2+1\/2*3+1\/3*4+.
1\/1*2+1\/2*3+1\/3*4+...+1\/99*100 =(1-1\/2)+(1\/2-1\/3)+(1\/3-1\/4)+...+(1\/99-1\/100)=1-1\/100 =99\/100 简便计算是一种特殊的计算,它运用了运算定律与数字的基本性质,从而使计算简便,使一个很复杂的式子变得很容易计算出得数。
1\/1*2+1\/2*3+1\/3*4+.+1\/99*100怎样简便运算?
=1-1\/2+1\/2-1\/3+1\/3-1\/4+...+1\/99-1\/100 =1-1\/100 =99\/100 =100分之99
1\/1*2+1\/2*3+1\/3*4+1\/4*5...+1\/99*100怎么用简便方法计算
1\/1*2+1\/2*3+1\/3*4+1\/4*5...+1\/99*100 =1-1\/2+1\/2-1\/3+1\/3-1\/4+...+1\/99-1\/100 =1-1\/100 =99\/100
1\/1*2+1\/2*3+1\/3*4+.+1\/99*100怎样简便运算
解:1\/1x2=1-1\/2(1)1\/2x3=1\/2-1\/3(2)1\/3x4=1\/3-1\/4(3)...1\/98x1\/99=1\/98-1\/99(98)1\/99x100=1\/99-1\/100(99)除了(1)和(2)之外,其中任意一项的前项和前一项的后项能够互相抵消,后项能和后面一项的前项相互抵消,即第(3)到第(98)项,然后第一项的后项...
1\/1乘于2+1\/2乘于3+1\/3乘于4+... ...+1\/99乘于100,等于多少?简便运算...
1\/1乘于2+1\/2乘于3+1\/3乘于4+...+1\/99乘于100 =1-1\/2+1\/2-1\/3+……+1\/99-1\/100 =1-1\/100 =99\/100
1\/1×2+1\/2×3+1\/3×4+……1\/99×100
1\/1×2 + 1\/2×3 + 1\/3×4 + ……+ 1\/99 × 100 = ( 1 - 1\/2) + ( 1\/2 - 1\/3) + ( 1\/3 - 1\/4) + …… + ( 1\/99 - 1\/100)= 1 - 1\/2 + 1\/2 - 1\/3 + 1\/3 - 1\/4 + …… + 1\/99 - 1\/100 = 1 - 1\/100 = 99\/100 ...
简便运算 1\/1*2+1\/2*3+1\/3*4+···+1\/8*9+1\/9*10 快点,好的20分_百...
解:1\/n(n+1)=1\/n+1\/(n+1)所以 原式=(1-1\/2)+(1\/2-1\/3)+...+(1\/8-1\/9)+(1\/9-1\/10)=1-1\/2+1\/2-1\/3+...+1\/8-1\/9+1\/9-1\/10 =1-1\/10 =9\/10 如果满意,记得采纳哦
1\/1*2*3+1\/2*3*4+1\/3*4*5+1\/4*5*6...+1\/98*99*100(简便运算,要过程...
所以1\/1*2*3+1\/2*3*4+1\/3*4*5+1\/4*5*6...+1\/98*99*100 =1\/2(1-1\/2) - 1\/2(1\/2-1\/3) + 1\/2(1\/2 - 1\/3) - 1\/2(1\/3 - 1\/4)...+1\/2(1\/98 - 1\/99) - 1\/2(1\/99 - 1\/100)=1\/2(1-1\/2-1\/99+1\/100)=1\/2(1\/2-1\/9900)=4949\/19800 ...