Odpowiedź:
a)
4/5 * 2/3 + 1/4 = 8/15 + 1/4 = 32/60 + 15/60 = 47/60
b)
1/6 + 3/8 * 1 7/9 = 1/6 + 3/8 * 16/9 = 1/6 + 1 * 2/3 = 1/6 + 2/3 = 1/6 + 4/6 =
= 5/6
c)
2 3/7 + 3/4 * 1 1/3 = 2 3/7 + 3/4 * 4/3 = 2 3/7 * 1 = 2 3/7
d)
1/9 * 1/5 + 2 1/2 = 1/45 + 2 1/2 = 2/90 + 2 45/90 = 2 47/90
e)
3 3/4 * ( 1 3/4 + 4/5) = 3 3/4 * ( 1 15/20 + 16/20) = 3 3/4 * 1 31/20 =
= 15/4 * 51/20 = 3/4 * 51/4 = 153/16 = 9 9/16
f)
(2 1/2 + 1/3) * 2 2/17 = ( 2 3/6 + 2/6) * 36/17 = 2 5/6 * 36/17 =
= 17/6 * 36/17 = 1 * 6 = 6
