五年级数学题
1/1*2+1/2*3+1/3*4+1/4*5+1/5*6...1/2000*2001
1/1*2+1/2*3+1/3*4+1/4*5+1/5*6...1/2000*2001 =(1-1/2)+(1/2-1/3)+(1/3-1/4)+......+(1/2000-1/2001) =1-1/2001 =2000/2001
1/1*2+1/2*3+1/3*4+1/4*5+1/5*6...1/2000*2001 =(1-1/2)+(1/2-1/3)+(1/3-1/4)+......+(1/2000-1/2001) =1-1/2001 =2000/2001
答:1详情>>
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