Задание 1 (найдите число x)

a) x = 5/8 - 3/8 = 2/8 = 1/4. b) x = 5/12 + 1/3 = 5/12 + 4/12 = 9/12 = 3/4. c) x = 5/12 / 2 = 5/12 x 1/2 = 5/24. d) x = 4/21 + 3/7 = 4/21 + 9/21 = 13/21. e) x = 5/8 - 1/3 = (15 - 8)/24 = 7/24.