a)
8 * (5/6 - 2/6) = 8 * 3/6 = 8 * 1/2 = 4
b)
14 2/3 - 6 * 2 1/3 = 14 2/3 - 6 * 7/3 =
= 14 2/3 - 2 * 7 = 14 2/3 - 14 = 2/3
c)
4 * (1/8 + 4/8) - 2 * 3/8 = 4 * 5/8 - 6/8 =
= 20/8 - 6/8 = 14/8 = 7/4 = 1 3/4
d)
5 3/4 - 1/4 * (6 2/7 - 3 2/7) =
= 5 3/4 - 1/4 * 3 = 5 3/4 - 3/4 = 5
