Dan has $ 26. He bought a candy bar for $ 29 and a chocolate for $ 18. How much money did he spend to buy candy bar than he did to buy chocolate?
Dan has $26. 
He buys a candy bar for $2. 
He buys a chocolate for $18. 

To answer this question, we need to find out how much more money he spent on the candy bar than he did on the chocolate. We can do this by subtracting the amount of money he spent on the chocolate from the amount of money he spent on the candy bar. 

$2 - $18 = -$16

This means that Dan spent $16 less on the chocolate than he did on the candy bar.