а) 4/9 + 3/5 = 20/45 + 27/45 = 47/4б) 7/18 + 7/12 = 14/36 + 21/36 = 35/3B) 11/25 + 13/50 = 22/50 + 13/50 = 35/50 = 7/1г) 5/38 + 7/19 = 95/722 + 266/722 = 361/722 = 1/2
а) 4/9 + 3/5 = 20/45 + 27/45 = 47/4
б) 7/18 + 7/12 = 14/36 + 21/36 = 35/3
B) 11/25 + 13/50 = 22/50 + 13/50 = 35/50 = 7/1
г) 5/38 + 7/19 = 95/722 + 266/722 = 361/722 = 1/2