Завдання 301 - 400 » 395

Обчисліть: 1) 28/21 – 12/3 = 129/21 – 114/21 = 15/21 = 5/7; 2) 49/16 – 25/24 = 427/48 – 210/48 = 217/48; 3) 112/13 – 7/65 = 160/65 – 7/65 = 153/65; 4) 57/20 – 213/15 = 521/60 – 252/60 = 481/60 = 229/60. 5) 83/14 – 42/7 = 717/14 – 44/14 = 313/14; 6) 65/12 – 21/2 = 517/12 – 26/12 = 311/12; 7) 91/15 – 62/25 = 880/75 – 66/75 = 274/75; 8) 111/2 – 517/22 = 1033/22 – 517/22 = 516/22.