Introduction
Why do we need to add?
Goal:
Goal:
Rodrick loves his pet fish. He has two tanks. He feeds his fish once a day, but he is out of food. He needs to buy some at the pet store.
Click fish tanks to enlarge
How should he decide how much food to buy?
Rodrick can use addition! The fish-food container will tell him how much food each fish needs. If Rodrick adds the number of fish in the first tank to the number of fish in the second tank, he will know how many fish to feed.