小学奥数..急需解答!谢谢!化简252525x252252/525525x525252

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小学奥数..急需解答!谢谢!
化简252525x252252/525525x525252

分子=252525×252252
=25×10101×252×1001
分母=
=525×1001×52×10101
252525×252252/525525×525252
=25×10101×252×1001/525×1001×52×10101
=25×252/525×52
=3/13