Purchase small zipper-style baggies and place 10 small objects in several bags, such as erasers or small toys. Each bag therefore represents 10. You must also have an additional 18 small objects loose that are not in a bag. Divide children into groups of two or three students to complete this activity together. Give the groups double digit math problems and let them use the bags of objects to help them. For example, if a problem is 24 + 12, the group would take two bags plus four loose objects and one bag and two loose objects. The students then can determine the answers from the amount of bags and loose objects they have.
Give children a pile of dominoes. Tell each child to pick two dominoes. The children must then convert the numbers from the dominoes into addition problems. For example, if a domino has one dot on one side and two dots on the other side, the first number in the problem would be 12. Give the children scratch paper to calculate their answers.
Divide the students into pairs. Each group needs a piece of scratch paper and a pencil. Write, or say, a double digit addition problem. When a group gets the answer, someone in the group raises his hand. If their answer is correct, he earns a point. This activity helps children learn to solve double digit addition problems quickly, yet accurately.
As long as the addition problems are not extremely complex, play Around the World to help students learn double digit addition problems. To play, choose one student to begin the game. This student stands up next to the student in the next desk. Ask a double digit addition problem. If the person sitting gets the answer correct, the person standing must sit down and the person sitting gets up and moves to the next student. Repeat the process as many times as you desire. The goal is to move “around the world” by answering the most questions correctly.