Вправи 201 - 300 » 234

Зведіть дріб: 1) 7/9 = (7 • 3)/(9 • 3) = 21/27; 2) 3/5 = (3 • 8)/(5 • 8) = 24/40; 3) 4/13 = (4 • 6)/(13 • 6) = 24/78; 4) 12/17 = (12 • 6)/(17 • 6) = 72/102; 5) 4/23 = (4 • 3)/(23 • 3) = 12/69; 6) 5/24 = (5 • 6)/(24 • 6) = 30/144.