Завдання 201 - 300 » 299

Знайди значення виразу: 1) 31/8 + 91/12 – 65/6 = 12(3 + 2)/24 – 65/6 = 125/24 – 65/6 = 1129/24 – 65/6 = 5(29 - 20)/24 = 59/24 = 53/8; 2) 53/5 + 411/15 – 81/12 = 1(36 + 44 - 5)/60 = 175/60 = 15/4 = 21/4; 3) 39/10 – 15/12 – 111/24 = 1(108 - 50 - 55)/120 = 13/120 = 11/40; 4) 135/6 – 81/4 – 51/3 = (10 - 3 - 4)/12 = 3/12 = 1/4; 5) 73/8 – (45/6 + 13/4) = 73/8 – 5(10 + 9)/12 = 73/8 – 519/12 = 611/8 – 67/12 = (33-14)/24 = 19/24; 6) 12 – (55/6 + 33/10) = 12 – 8(25 + 9)/30 = 12 – 834/30 = 12 – 817/15 = 12 – 92/15 = 1115/15 – 92/15 = 213/15.