Jerry had 45 action figures and 5 books on a shelf in his room. Later he added 11 more books to the shelf. How many books were on his shelf in all?
Jerry had 45 action figures and 5 books on a shelf in his room. 

This means that Jerry had a total of 50 items on his shelf. 

Later he added 11 more books to the shelf. 

This means that Jerry now has a total of 61 items on his shelf. 

61 - 50 = 11 

This means that Jerry had 11 books on his shelf in all.