Завдання 201 - 300 » 289

Обчисли: 1) 81/4 – 51/2 = 75/4 – 51/2 = 2(5 - 2)/4 = 23/4; 2) 74/15 – 43/5 = 619/15 – 43/5 = 2(19 - 9)/15 = 210/15 = 22/3; 3) 122/5 – 53/4 = 117/5 – 53/4 = 6(28 - 15)/20 = 613/20; 4) 63/10 – 47/15 = 513/10 – 17/15 = 4(39 - 14)/30 = 425/30 = 15/6; 5) 95/18 – 17/12 = 823/18 – 17/12 = 7(46 - 21)/36 = 725/36; 6) 87/15 – 217/18 = 722/15 – 217/18 = 5(132 - 85)/90 = 547/90; 7) 82/3 – 75/7 = 75/3 – 75/7 = (35 - 15)/21 = 20/21; 8) 73/16 – 15/24 = 619/16 – 15/24 = 5(57 - 10)/48 = 547/48.