Пошаговое объяснение:
Первый пример:
1) 33/30 = 11/10
2) 11/10 - 4/5 = 11/10 - 8/10 = 3/10
3) 3/10 * 2 2/9 = 3/10 * 20/9 = 3*20/10*9 = 2/3
4) 2/3 + 2/5 = 10/15 + 6/15 = 16/15 = 1 1/15
ответ: 1 1/15
Второй пример:
1) 4 : 4 4/5 = 4 : 24/5 = 4 * 5/24 = 5/6
2) 2 2/7 * 5 1/4 = 16/7 * 21/4 =16*21/7*4 = 4*3 = 12
3) 5/6 + 12 = 12 5/6
4) 12 5/6 - 7 11/12 = 12 10/12 - 7 11/12 = 11 22/12 - 7 11/12 = 4 11/12
ответ: 4 11/12
Третий пример:
1) 48/45 = 16/15
2) 16/15 - 1/3 = 16/15 - 5/15 = 11/15
3) 11/15 * 2 1/11 = 11/15 * 23/11 = 11*23/15*11 = 23/15 = 1 8/15
4) 3 2/9 - 1 8/15 = 3 10/45 - 1 24/45 = 2 55/45 - 1 24/45 = 1 31/45
ответ: 1 31/45
