Odpowiedź:
9.
a)
5/7 = 45/63 < 7/9 = 49/63
b)
15/12 = 75/60 > 1 1/5 = 6/5 = 72/60
c)
5/12 = 10/24 > 3/8 = 9/24
10.
a)
4/7 + 3/4 = 16/28 + 21/28 = 37/28 = 1 9/28
b)
3 2/7 - 1 5/7 = 2 9/7 - 1 5/7 = 1 4/7
c)
5/12 + 9/20 = 25/60 + 27/60 = 52/60 = 13/15
d)
3/5 : 4/7 = 3/5 * 7/4 = 21/20 = 1 1/20
Szczegółowe wyjaśnienie:
