Katie is making bread that needs 3 pounds of flour. Sheila is making another kind of bread that needs 2 more pounds of flour. How many pounds of flour do they need together?
Sheila needs 3 + 2 = <T>add(3, 2)=5 pounds of flour.
Together, they need 3 + 5 = <T>add(3, 5)=8 pounds of flour.
