2 4/15 - (2 - 1 1/15) : 4/9 + 9/2 = 4 2/3
1) 2 - 1 1/15 = 1 15/15 - 1 1/15 = 14/15
2) 14/15 : 4/9 = 14/15 · 9/4 = (7·3)/(5·2) = 21/10 = 2 1/10
3) 2 4/15 - 2 1/10 = 2 8/30 - 2 3/30 = 5/30 = 1/6
4) 1/6 + 9/2 = 1/6 + 27/6 = 28/6 = 14/3 = 4 2/3
ответ: 4 целых 2/3.
2 4/15 - (2 - 1 1/15) : 4/9 + 9/2 = 4 2/3
1) 2 - 1 1/15 = 1 15/15 - 1 1/15 = 14/15
2) 14/15 : 4/9 = 14/15 · 9/4 = (7·3)/(5·2) = 21/10 = 2 1/10
3) 2 4/15 - 2 1/10 = 2 8/30 - 2 3/30 = 5/30 = 1/6
4) 1/6 + 9/2 = 1/6 + 27/6 = 28/6 = 14/3 = 4 2/3
ответ: 4 целых 2/3.