Объяснение:
5) 4/10. 7) 8/30. 6) 5/25
5/12+1/60=26/60=13/30
9/10+4/15=35/30=1 5/20= 1 1/4
9/17-19/68=104/68= 1 36/68
4/15-11/60=27/60=9/20
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Объяснение:
5) 4/10. 7) 8/30. 6) 5/25
5/12+1/60=26/60=13/30
9/10+4/15=35/30=1 5/20= 1 1/4
9/17-19/68=104/68= 1 36/68
4/15-11/60=27/60=9/20