Odpowiedź :
Odpowiedź:
a)
8 4/5 + 1 1/5 : 3 3/5 = 8 4/5 + 6/5 : 18/5 = 8 4/5 + 6/5 * 5/18 =
= 8 4/5 + 1 * 1/3 = 8 4/5 + 1/3 = 8 12/15 + 5/15 = 8 17/15 = 9 2/15
b)
(5 1/8 - 2 5/6) * ( 2/5 + 2/7) = (5 3/24 - 2 20/24) * ( 14/35 + 10/35) =
= ( 4 27/24 - 2 20/24) * 24/35 = 2 7/24 * 24/35 = 55/24 * 24/35 =
= 11 * 1/7 = 11/7 = 1 4/7