At the arcade Dave had won 6 tickets. If he used 7 to buy some toys and 3 more to buy some clothes How many more tickets did Dave use to buy toys than he did to buy clothes?
Dave had won 6 tickets. 
He used 7 tickets to buy toys. 
That means he had 1 ticket left. 
He used 3 tickets to buy clothes. 
That means he had no tickets left. 

So, Dave used 4 more tickets to buy toys than he did to buy clothes.