(34+3434+343434)/(51+5151+515151)

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(34+3434+343434)/(51+5151+515151)

(34+3434+343434)/(51+5151+515151)
(34+3434+343434)/(51+5151+515151)

(34+3434+343434)/(51+5151+515151)
(34+3434+343434)/(51+5151+515151)
=34(1+101+10101)/[51(1+101+10101)]
=34/51
=2/3

上下都能提取(1+101+10101)剩下就是34/51=2/3

34(1+101+10101)/51(1+101+10101)=34/51=2/3

34+3434+343434=34*(1+101+10101)
51+5151+515151=51*(1+101+10101)
原式=34/51=2/3