Montessori Subtraction Strip Board (Premium Quality)

The Subtraction Strip Board helps a child understand basic subtraction, and prepares a child for more abstract math. 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 and 18 natural wooden strips of varying lengths. Approximately 16”x12” Like new.