Add, Sub within 10, 20, 30, 40, 50, 100 with regrouping | Christmas picture. Add, Sub within 10, 20, 30, 40, 50, 100 with regrouping | Christmas picture. — This resource is an all-in-one learning system—color and black-and-white in one booklet—to save paper and give choice. Every page features an encouraging message, turning practice into a fun, confidence-building challenge that strengthens fine motor skills and academic fluency. Answers connect to reveal a picture, enabling insta