Click on the numbers that add up to 20, one equation at a time! These could be 14 and 6, or the numbers 10 and 10. In the digital game Treasure Diving: Compose Numbers to Make 20 (Game 2), children in first grade can practice their addition within 20 and other math skills. This math practice is even more exciting because if they pick the equations that make 20, then they can win the treasure.