1.252525*252252/525252*525525(分数1)乘987*655-321/666+987*654(分数2)

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1.252525*252252/525252*525525(分数1)乘987*655-321/666+987*654(分数2)
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1.252525*252252/525252*525525(分数1)乘987*655-321/666+987*654(分数2)
1.252525*252252/525252*525525(分数1)乘987*655-321/666+987*654(分数2)

1.252525*252252/525252*525525(分数1)乘987*655-321/666+987*654(分数2)
.252525*252252/525252*525525(分数1)乘987*655-321/666+987*654(分数2)
=(25*10101)*(252*101)/[(52*10101)*(525*101)]*(987*655-321)/[666+987*(655-1)]
=(25*252)/(52*525)*(987*655-321)/(987*655-987+666)
=3/13*(987*655-321)/(987*655-321)
=3/13*1
=3/13