Jerry had 3 action figures and 13 books on a shelf in his room. Later he added 6 more books to the shelf. How many books were on his shelf in all?
Jerry had 3 action figures and 13 books on a shelf in his room. 

This means that the total number of objects on the shelf is 3 + 13 = 16. 

Later he added 6 more books to the shelf. 

This means that the total number of objects on the shelf is now 16 + 6 = 22. 

In all, there were 22 objects on Jerry's shelf.