Introduce your children to counting with Melissa & Doug's Write-a-Mat Subtractionlearning placemat. Reusable, children can write in their answers with a No. 2 pencil or (not-included) Learning Mat Crayons. Perfect for lunch-time drills, extra practice---and entertainment---at restaurants, and fun supplemental seatwork practice! This subtraction mat features facts that cover adding 0-10 by 0-9 for a total of 110 problems. The back of the sheet features the problems with answers in red. Ages 5 & up. 17.25" x 11.25".