5/14÷6/7x5/4，1/28÷22/14x1/30，5+3/5x1/6，5/12x12/13
5/14÷6/7x5/4，1/28÷22/14x1/30，5+3/5x1/6，5/12x12/13x12/11...
5/14÷6/7x5/4，1/28÷22/14x1/30，5+3/5x1/6，5/12x12/13x12/11
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5/14÷6/7x5/4
=5/12x5/4
=25/48
1/28÷22/14x1/30
=1/44x1/30
=1/1320
5+3/5x1/6
=5+1/10
=5又1/10
5/12x12/13=5/13
=5/12x5/4
=25/48
1/28÷22/14x1/30
=1/44x1/30
=1/1320
5+3/5x1/6
=5+1/10
=5又1/10
5/12x12/13=5/13
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