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Calculati va rog frumos urgent:7/10+3/5 ,3/5+3/20 ,5/4+1/2 ,1/3+1/2 ,5/7+3/5.VA ROG FRUMOS IMI TREBUIE URGENT.DAU COROANA

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7/10+3/5=7/10+6/10=13/10=1 intreg si 3/10.
3/5+3/20=12/20+3/20=15/20.
5/4+1/2=5/4+2/4=7/4=1 intreg 3/4.
1/3+1/2=2/6+3/6=5/6.
5/7+3/5=25/35+21/35=46/35=1 intreg 11/35.

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