This picture and story will help you remember 3 x 7 = 213 (Tree) x 7 (Surfin) = 21 (Denty Sun)To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoFact Navigator You're learning3x7217x321 Move on to other facts: Back Next 3 X 6 18 3 X 8 24 View All Facts
