The Action of Subtraction (Math Is Categorical)

Brian P. Cleary and Brian Gable, author and illustrator of the best-selling Words Are CATegorical® series, bring their trademark sense of humor to the subject of subtraction, proving that sometimes, less is really more. The comical cats show young readers the basic concept of taking one number away from another. Funny illustrations and examples make learning to subtract as easy as 3, 2, 1!