Завдання 301 - 400 » 354

Обчисли: 1) 3/5 · 15/6 = (3 ∙ 11)/(5 ∙ 6) = 11/10 = 11/10; 2) 22/5 · 5/24 = (12 ∙ 5)/(5 ∙ 24) = 1/2; 3) 3/8 · 44/15 = (3 ∙ 64)/(8 ∙ 15) = 8/5 = 13/5; 4) 41/3 · 3/10 = (13 ∙ 3)/(3 ∙ 10) = 13/10 = 13/10; 5) 21/6 · 3 = (13 ∙ 3)/6 = 13/2 = 61/2; 6) 24/15 · 5 = (34 ∙ 5)/15 = 34/3 = 111/3; 7) 15/21 · 42 = (26 ∙ 42)/21 = 524 8) 16 · 13/40 = (16 ∙ 43)/40 = 86/5 = 171/5.