Tommy has 3 toy cars. His neighbor, Jessie, has 3 cars too. Jessie's older brother has 5 more cars than Tommy and Jessie. How many cars do the three of them have altogether?
Tommy and Jessie have 3 + 3 = <T>add(3, 3)=6 cars.
Jessie's brother has 5 + 6 = <T>add(5, 6)=11 cars.
Altogether, they have 6 + 11 = <T>add(6, 11)=17 cars.
