5 FREE Christmas Color by Number: Addition, Subtraction, and Number Recognition Within 10 for Kindergarten, First Grade, and Second Grade! Make math and number practice fun and festive with this free Christmas-themed color-by-number set. Designed for First Grade and perfect for Kindergarten review, these worksheets can be used for morning work, math centers, early finishers, small group activities, independent practice, or homework. Students solve the problems or match the numbers and use the co