125/25+13/169=25+1/13 aducem la acelasi numitor
325+1/13=326/13
49/2+7/10=245+7/10=252/10=126/5
25/2+7/10=50+7/10=57/10
2/9+4/9=6/9=2/3
50/9+15/9=65/9
2intregi 36-3/90 +3/4=
2intregi33/90 +3/4=
2.....11/30+3/4=
71/30+3/4 aducem la acelasi numitor 142+45/60=187/60
