Loading Video: Add Three Numbers Up to 20 START Remove ads and gain access to the arcade and premium games! Subscribe Remove Ads More Ways To Use Math Games Game Quickplay Offline Worksheets Want a paper copy? Print a generated PDF for this skill. Share Skill Create Assignment Share MathGames with your students, and track their progress. Top Mathematicians Leaderboards See how you scored compared to other students from around the world. Play Skill Addition Add Three Numbers Up to 20 Math Games for Teachers Share On Google Classroom Create a google class assignment that allows students to generate and complete their own worksheets Create Assignment Create a MathGames assignment using a Parent or Teacher account for a student on MathGames. Create Assessment Find out exactly what level your students are at with a detailed assessment of their skill level. Curriculum Information See what Common Core State Standard this skill aligns with. Copy This Link Into Your Lesson Plan Directly http://www.mathgames.com/skill/1.48-add-three-numbers-up-to-20 This link leads directly to this skill, no student accounts needed. Copy To Clipboard If you notice any problems, please let us know.