Question

1. Выполни действия:
12 – 7/18 9 11/15 + 5 8/15 10 7/14 – 3 9/14
11 – 3 5/12 4 5/11 + 1 6/11 7 8/25 – 2 18/25
14 – 3 4/19 8 7/15 + 3 12/15 8 7/20 – 7 13/20
2. Реши по действиям:
(7 5/14 + 2 9/14 ) – 3 5/8 12 2/13 – (8 12/13 + 1 5/13 )
(8 – 4 3/11 ) + 2 8/11 11 1/7 – (5 4/7 + 3 6/7 )
3. Реши уравнения:
6 2/13 – х = 3 7/13 (х + 2 4/11 ) – 4 7/11 = 1 6/11
у – 5 8/9 = 3 5/9 (х – 1 8/9 ) + 3 7/9 = 4 4/9
8 8/11 – z = 3 9/11 (3 9/13 + у ) – 4 9/13 = 1 7/13
х + 2 4/5 = 4 3/5 8 16/27 – (х – 2 17/27 ) = 8 5/27