1) 1 1/2 - 2/5 = 1,5 - 0,4 = 1,1 = 1 1/10
2) 3/4 + 5/6 = 9/12 + 10/12 = 19/12
3) 2 3/4 : 1 1/10 = 11/4 * 10/11 = 5/2
4) 19/12 : 3 1/6 = 19/12 * 6/19 = 1/2
5) 5/2 + 1/2 = 6/2 = 3
ответ: 3
1) 1 1/2 - 2/5 = 1,5 - 0,4 = 1,1 = 1 1/10
2) 3/4 + 5/6 = 9/12 + 10/12 = 19/12
3) 2 3/4 : 1 1/10 = 11/4 * 10/11 = 5/2
4) 19/12 : 3 1/6 = 19/12 * 6/19 = 1/2
5) 5/2 + 1/2 = 6/2 = 3
ответ: 3