Learning Puzzles Addition Subtraction Author:Scholastic Here?s a fun way to teach and reinforce addition and subtraction skills! The 20 self-checking, 5-piece puzzles in the set are designed to help children develop automaticity in addition and subtraction. Each puzzle is unique?great for self-checking?and features the answer at the center piece and four puzzle pieces, each showing an addition or sub... more »traction problem! Start building a foundation for academic success with the Learning Puzzles: Simple Addition & Subtraction set. For use with Grades PreK-1.« less