Odpowiedź :
15 * 5 1/3 = 15 * 16/3 = 5 * 16 = 80
2 1/3 * 1 5/7 = 7/3 * 12/7 = 4
6 1/4 : 15 = 25/4 * 1/15 = 5/12
4 2/7 : 2 2/9 = 30/7 : 20/9 = 30/7 * 9/20 =
= 54/28 = 1 26/28 = 1 13/14
15 * 5 1/3 = 15 * 16/3 = 5 * 16 = 80
2 1/3 * 1 5/7 = 7/3 * 12/7 = 4
6 1/4 : 15 = 25/4 * 1/15 = 5/12
4 2/7 : 2 2/9 = 30/7 : 20/9 = 30/7 * 9/20 =
= 54/28 = 1 26/28 = 1 13/14