Завдання 401 - 500 » 458

Обчисли: 1) 63/7 · 31/3 : 12/7 = 45/7 · 10/3 : 9/7 = (45 ∙ 10 ∙ 7)/(7 ∙ 3 ∙ 9) = 50/3 = 162/3; 2) (72/3 – 54/5) : 24/5 = (65/3 – 54/5) : 24/5 = 1(25 - 12)/15 : 24/5 = 113/15 : 24/5 = 28/15 : 14/5 = (28 ∙ 5)/(15 ∙ 14) = 2/3.

Завдання 401 - 500