Free Printable Christmas Math Worksheets: Pre K, 1st Grade & 2nd Grade ... Christmas Math Worksheets: Addition and Subtraction. These Christmas themed math worksheets for elementary schoolers are 1st grade or 2nd grade level math. Addition sums in double digits from 1 - 20. Subtraction differences in single digits from 1 - 10. They feature a puppy and a penguin ready for Santa!