Danny collects bottle caps and wrappers. He found 3 wrappers and 6 bottle caps at the park. Now he has 13 bottle caps and 17 wrappers in his collection. How many more bottle caps than wrappers did danny find at the park?
Danny found 3 wrappers and 6 bottle caps at the park. 
Now he has 13 bottle caps and 17 wrappers in his collection.

We can see that Danny has a total of 13 + 6 = 19 bottle caps and a total of 3 + 17 = 20 wrappers. 

We're looking for how many more bottle caps than wrappers Danny found at the park, so we want to know how many more bottle caps Danny has than wrappers. 

We can find this out by subtracting the total number of wrappers from the total number of bottle caps: 

19 - 20 = -1

This means that Danny has 1 fewer bottle cap than wrapper in his collection.