Răspuns :

Explicație pas cu pas:

20:2=10

2:2=1

4:2=2

8:2=4

16:2=8

14:2=7

18:2=2

22:2=11

32:2=16

26:2=13

40:2=20

60:2=30

80:2=40

62:2=31

36:2=18

58:2=29

76:2=38

32:2=16

78:3=39

28:2=14