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(1%1/2%1/3%1/4%1/5)(1/2+1/3+1/4+1/5+1/6)%(...

设+1/2+1/3+1/4=x 1/2+1/3+1/4+1/5=y (1+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+x)y-(1+y)x =y+xy-x-xy =y-x =1/5

1+1/2+1/3+1/4+1/5+1/6脱式计算 =1+30/60+20/60+15/60+12/60+10/60 =1+50/60+27/60+10/60 =1+87/60 =2又9/20

1/3+2/3=1 1/4+2/4+3/4=2/4+1=1/2+1 1/5+2/5+3/5+4/5=(1/5+4/5)+(2/5+3/5)=1+1 1/6+2/6+3/6+4/6+5/6=(1/6+5/6)+(2/6+4/6)+3/6=1+1+1/2 应该能看出规律了吧 那么7为分母的结果为1+1+1 8为分母的结果为1+1+1+1/2 9的为1+1+1+1 10的为1+1+1+1+1/2 ...

1/3+2/3=1 1/4+2/4+3/4=2/4+1=1/2+1 1/5+2/5+3/5+4/5=(1/5+4/5)+(2/5+3/5)=1+1 1/6+2/6+3/6+4/6+5/6=(1/6+5/6)+(2/6+4/6)+3/6=1+1+1/2 应该能看出规律了吧 那么7为分母的结果为1+1+1 8为分母的结果为1+1+1+1/2 9的为1+1+1+1 10的为1+1+1+1+1/2 ...

解:原式=(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) -(1-1/2-1/3-1/4-1/5)*(1/2+1/3+1/4+1/5)+1/6*(1/2+1/3+1/4+1/5) =1/6*(1-1/2-1/3-1/4-1/5+1/2+1/3+1/4+1/5) =1/6*1 =1/6 希望对你有帮助,满意请采纳,...

原式= (1/2)(2/3)(3/4)(4/5)(5/6)(6/7)(7/8)(8/9)/(0.1+0.9+0.2+0.8+0.3+0.7+0.4+0.6+0.5) 分子可以约分,约分后很简单,可得分子为1/9,分母组合后算出来是4.5,分子除以分母 原式=1/9/4.5=2/81

(1/2+1/3+1/4+…+1/25)+(2/3+2/4+2/5+…2/25)+…+(23/24+23/25)+24/25 =1/2+(1/3+2/3)+(1/4+2/4+3/4)+(1/5+2/5+3/5+4/5)+......+(1/25+2/25+......+24/25) =1/2+2*3/(2*3)+3*4/(2*4)+4*5/(2*5)+......+24*25/(2*25) =1/2+2/2+3/2+4/2+......+2...

(1+1/2+1/3+1/4)*(1/2+1/3+1/4)-(1/2+1/3+1/4+1/5)*(1/2+1/3+1/4) =(1/2+1/3+1/4)*[(1+1/2+1/3+1/4)-(1/2+1/3+1/4+1/5)] =(1/2+1/3+1/4)*(1-1/5) =(1/2+1/3+1/4)*4/5 =13/12 * 4/5 =13/15

1(只)+1(只)=1(双) 5(点)+8(点)=1(点)(13点就是下午1点) 3(天)+4(天)=1(星期) 朋友,请及时采纳正确答案,下次还可能帮到您哦,您采纳正确答案,您也可以得到财富值,谢谢。

(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) -(1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5) =(1/2+1/3+1/4+1...

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