For Gwen's birthday she received 39 dollars from her mom. Her dad gave her 41 more dollars. If she spent 38 dollars. How much money did she still have?
Gwen's mom gave her 39 dollars. 
Gwen's dad gave her 41 more dollars. 
That means she had a total of 80 dollars. 
If she spent 38 dollars, she would have 42 dollars left.