5. 60 – (43 – 20) (28 + 40) – 20 8 – 2 + 7

1) $$60 - (43 - 20) = 60 - 23 = 37$$

 43
-20
---
 23

 60
-23
---
 37

2) $$(28 + 40) - 20 = 68 - 20 = 48$$

 28
+40
---
 68

 68
-20
---
 48

3) $$8 - 2 + 7 = 6 + 7 = 13$$

 8-2=6
 6+7=13

Ответ: 37; 48; 13