2.7 + 2 ○ 2.8 9. 2 + 9 ○ 9.3 10. 6+2.3 ○ 2.8 11. 5+2.2 ○ 2.6

* 2.7 + 2 = 4.7
4. 7 > 2.8

* 9. 2 + 9 = 18.2
19. 2 > 9.3

* 10.6 + 2.3 = 4.9
20. 9 > 2.8

* 11.5 + 2.2 = 4.7
21. 7 > 2.6

Ответ:

* 2. 7 + 2 > 2.8

* 9. 2 + 9 > 9.3

* 10.6 + 2.3 > 2.8

* 11.5 + 2.2 > 2.6