Kid Advance Montessori Subtraction Strip Board

A wooden board, 12 squares by 18 squares, with the numerals 1-18 printed across the top. A wooden box contains 9 red wooden strips and 9 blue wooden strips both printed with the numerals 1 to 9. Another wooden box contains 18 natural wooden strips of varying lengths. Children use the Subtraction Strip Board by selecting subtraction combinations of one through eighteen, thus reinforcing the child's comprehension of subtraction tables.
Dimensions of the wooden board: 16 x 12 inches.
2 wooden boxes are included: One for the red and blue strips and one for the natural color strips.
Recommended ages: 5.5 years and up.