Завдання 301 - 400 » 381

Обчисліть: 1) 11/12 – 1/3 = 11/12 – 4/12 = 7/12; 2) 16/21 – 3/14 = 32/42 – 9/42 = 23/42; 3) 17/72 – 2/9 = 17/72 – 16/72 = 1/72; 4) 21/25 – 8/15 = 63/75 – 40/75 = 23/75; 5) 1/2 – 3/16 = 8/16 – 3/16 = 5/16; 6) 5/16 – 5/24 = 15/48 – 10/48 = 5/48; 7) 4/9 – 11/27 = 12/27 – 11/27 = 1/27; 8) 27/49 – 5/14 = 54/98 – 35/98 = 19/98.