Odpowiedź:
1/5 * 7/8 = 7/40
3/7 * 5/8 = 15/56
2/5 * 13/7 = 26/35
1/4 * 17/19 = 17/76
zad 5
1 i 1/3 * 2/5 = 4/3 * 2/5 = 8/15
5 i 1/2 * 3/4 = 11/2 * 3/4 = 33/8 = 4 i 1/8
3/8 * 6 i 3/4 = 3/8 * 27/4 = 81/32 = 2 i 17/32
2 i 2/5 * 5 i 1/2 = 12/5 * 11/2 = 66/5 = 13 i 1/5
1 i 2/3 * 3 i 1/8 = 5/3 * 25/8 = 125/24 = 5 i 5/24
4 i 1/6 * 3 i 1/4 = 25/6 * 13/4 = 325/24 = 13 i 13/24
