Odpowiedź:
zad 11
a)
1 1/3 * 9/11 = 4/3 * 9/11 = 4 * 3/11 = 12/11 = 1 i 1/11
4 3/14 * 7 = 59/14 * 7 = 59/2 = 29 i 1/2
b)
15 * 3 1/5 = 15 * 16/5 = 3 * 16 = 48
3 2/3 * 1 3/5 = 11/3 * 8/5 = 88/15 = 6 i 8/15
zad 12
a)
5/7 : 3 = 5/7 * 1/3 = 5/21
6 : 2 1/5 = 6 : 11/5 = 6 * 5/11 = 30/11 = 2 i 8/11
7 1/6 : 9 = 43/6 : 9 = 43/6 * 1/9 = 43/54
b)
2/3 : 3/5 = 2/3 * 5/3 = 10/9 = 1 i 1/9
3 3/7 : 5/8 = 24/7 * 8/5 = 192/35 = 5 i 7/35 = 5 i 1/5
1 3/4 : 1 3/5 = 7/4 : 8/5 = 7/4 * 5/8 = 35/32 = 1 i 3/32
