Выполните: 1) 7 14/15+2 1/15 2) 9 24/27 +12 13/27 3) 1- 12/19 4) 8-3 6/15 5) 12-11 6/11 6) 16 3/13 - 6 8/13 7)13 4/9

Найдем значения выражений:

1) 7 14/15 + 2 1/15 = 7 + 14/15 + 2 + 1/15 = 9 + (14 + 1)/15 = 9 + 1 = 10; 

2) 9 24/27 + 12 13/27 = 9 + 24/27 + 12 + 13/27 = 21 + (24 + 13)27 = 21 + 37/27 = 21 + 1 + 10/27 =  22 10/27;

3) 1 - 12/19 = 19/19 - 12/19 = 7/19; 

4) 8 - 3 6/15 = 5 - 6/15 = 4 + 15/15 - 6/15 = 4 + 9/15 = 4 + 3/5 = 4 3/5; 

5) 12 - 11 6/11  = 11 + 11/11 - 11 - 6/11 = 5/11;

6) 16 3/13 - 6 8/13 = 10 + 3/13 - 8/13 = 10 - 5/13 = 9 + 8/13 = 9 8/13; 

7) 13 4/9 - 2 8/9 = 11 + 4/9 - 8/9 = 11 - 4/9 = 10 5/9; 

8) 10 7/16 - 4 12/16 = 6 - 5/16 = 5 + 11/16 = 5 11/16; 

9) 29 49/53 - 8 49/53  = 21 + 0 = 21;

10) (20 16/25 + 13 9/25) - (23 4/14 + 7 13/14) = 33 + 25/25 - 30 - 17/14 = 3 + 1 - 1 - 3/14 = 3 - 3/14 = 2 + 11/14 = 2 11/14.