Пошаговое объяснение:
4 14/45 - ( 1 7/15 + 2/5) = 2 4/9
1) 1 7/15 + 2/5 = 1 7/15 + 6/15 = 1 13/15;
2) 4 14/45 - 1 13/15 = 3 59/45 - 1 39/45 = 2 20/45 = 2 4/9;
