Завдання 301 - 400 » 375

Виконай дії: 1) (61/8 · 12/7 – 211/14 · 13/5 = ((49 ∙ 9)/(8 ∙ 7) – (39 ∙ 21)/(14 ∙ 13)) = (63/8 – 9/2) · 13/5 = (77/8 – 41/2) · 13/5 = 3(7 - 4)/8 · 13/5 = 33/8 · 13/5 = (27 ∙ 8)/(8 ∙ 5) = 27/5 = 52/5; 2) (41/3 – 34/9)2 · (21/4)2 = (34/3 – 34/9)2 · (9/4)2 = ((12 - 4)/9)2 · (9/4)2 = (8 ∙ 8 ∙ 9 ∙ 9)/(9 ∙ 9 ∙ 4 ∙ 4) = 4.

Завдання 301 - 400