Завдання 301 - 400 » 355

Обчисли: 1) 41/3 · 3/10 = (13 ∙ 3)/(3 ∙ 10) = 13/10 = 13/10; 2) 7/9 · 12/7 = (7 ∙ 9)/(9 ∙ 7) = 1; 3) 4/11 · 47/12 = (4 ∙ 55)/(11 ∙ 12) = 5/3 = 12/3; 4) 11/9 · 3/10 = (10 ∙ 3)/(9 ∙ 10) = 1/3; 5) 27 · 14/9 = (27 ∙ 13)/9 = 39; 6) 4 · 25/24 = (4 ∙ 53)/24 = 53/6 = 85/6; 7) 15/6 · 18 = (11 ∙ 18)/6 = 33; 8) 12 · 33/8 = (12 ∙ 27)/8 = 81/2 = 401/2.