Odpowiedź:
zad 9
a)
(3 3/5 + 2 4/5) : 6/7 = 5 7/5 : 6/7 = 32/5 * 7/6 = 16/5 * 7/3 = 112/15 =
= 7 7/15
b)
3/4 : 4 1/2 + 7 : 1 1/6 = 3/4 : 9/2 + 7 : 7/6 = 3/4 * 2/9 + 7 * 6/7 =
= 1/2 * 1/3 + 6 = 1/6 + 6 = 6 1/6
c)
3/5 : ( 1 1/2 - 3/4) = 3/5 : ( 1 2/4 - 3/4) = 3/5 : ( 6/4 - 3/4) = 3/5 : 3/4 =
= 3/5 * 4/3 = 1/5 * 4 = 4/5
