These addition problems have visual cues so the child knows which numerals to add. This is based on the Montessori Method where the numerals in the ones and thousands positions are both green, tens are blue, and hundreds are red. Since both the ones and thousands are green I added an extra green line under the thousands position. The numerals use a 48 font size. There are 26 pages with 6 problems per page. 21 of the pages are 4 digit plus 4 digit and 4 pages have 3 digit plus 3 digit.