Odpowiedź:
(3 1/3 + 2 5/6) * 6 = ( 3 2/6 + 2 5/6) * 6 = 5 7/6 * 6 = 37/6 * 6 = 37
3 1/3 : (5/6 - 3/4) = 10/3 : ( 10/12 - 9/12) = 10/3 : 1/12 = 10/3 * 12 = 10 * 4 = 40
(5 * 2/15 + 1/2) - 3/5 = (1 * 2/3 + 1/2) - 3/5 = (2/3 + 1/2) - 3/5 =
= (4/6 + 3/6) - 3/5 = 7/6 - 3/5 = 35/30 - 18/30 = 17/30
1 9/25 * 2 1/17 = 34/25 * 35/17 = 2/5 * 7 = 14/5 = 2 4/5
7/9 : 28/45 = 7/9 * 45/28 = 1 * 5/4 = 5/4 = 1 1/4