Marco and his dad went strawberry picking. Marco's strawberries weighed 2 pounds. If together their strawberries weighed 10 pounds. How much more did his dad's strawberries weigh than his?
1. Marco's strawberries weigh 2 pounds. 
2. Together, Marco and his dad's strawberries weigh 10 pounds. 
3. Marco's dad's strawberries weigh 8 pounds.