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问题: 请问一题.8181818181/1818181818-81818181/18181818=?谢谢!

8181818181/1818181818-81818181/18181818=?谢谢

解答:

8181818181/1818181818=(81*101010101)/(18*101010101)9/2
01010101/18181818=(81*1010101)/(18*1010101)=9/2
所以,原式=9/2-9/2=0.