Завдання 1403 - 1500 » 1451

Виконай дії: 1) (6,4 · 211/12 – 16) · 2,25 = ((32 ∙ 35)/(5 ∙ 12) – 16) · 2,25 = (182/3 – 16) · · 2,25 = 22/3 · 21/4 = (8 ∙ 9)/(3 ∙ 4) = 6; 2) 21/7 · (32/3 – 2,5) – 11/8 = 21/7 · (32/3 – 21/2) – 11/8 = 21/7 · 11/6 – 11/8 = (15 ∙ 7)/(7 ∙ 6) – 11/18 = 21/2 – 11/8 = 13/8.