а) 42/3 12/7 = (42 12) / (3 7) = 504 / 21 = 24б) 5/8 4/5 = (5 4) / (8 5) = 20 / 40 = 1/2в) 9/28 * 7 = 9/4
а) 42/3 12/7 = (42 12) / (3 7) = 504 / 21 = 24
б) 5/8 4/5 = (5 4) / (8 5) = 20 / 40 = 1/2
в) 9/28 * 7 = 9/4