Ed had 16 more marbles than Doug. Doug lost 5 of his marbles at the playground. If Ed had 32 marbles How many marbles does Doug have now?
Ed had 16 more marbles than Doug. 

That means that if we start with Doug's number of marbles, and add 16, we'll get Ed's number of marbles. 

Doug lost 5 of his marbles at the playground. 

That means that if we start with Doug's number of marbles, and subtract 5, we'll get Doug's current number of marbles. 

Ed had 32 marbles. 

That's just a fact. 

So if we start with Ed's number of marbles (32), and subtract 16, we'll get Doug's original number of marbles. Then, if we subtract 5 more from that, we'll get Doug's current number of marbles. 

So Doug's current number of marbles is 32 - 16 - 5, or 11.