The author and illustrator of the best-selling Words Are CATegorical® series brings their trademark sense of humor to the subject of subtraction. Rhyming text filled with funny, countable examples shows what it means to take one number away from another. Readers are also introduced to the terminology they'll encounter as they learn to subtract. From the author and illustrator duo of the best-selling Words Are CATegorical® series, Math Is CATegorical® introduces basic math concepts for young readers and reveals that sometimes math is easier to show than explain! Pairing clever rhyming verse with comical cartoon cats, Brian P. Cleary and Brian Gable help children add up just how fun math can be! Brian P. Cleary is an American humorist, poet, and author. He is best known for his books written for grade-school children that explore grammar, math and poetry in humorous ways. In his role in the digital division of American Greetings, he's put words in the mouths of Dolly Parton, Christina Aguilera, William Shatner, Meghan Trainor and more. The multi-million selling author has performed poetry workshops in 500 elementary schools across the county. He lives in Cleveland, Ohio. Brian Gable is the illustrator of many of the best-selling Words Are CATegorical® books, as well as the Math Is CATegorical® series. Mr. Gable lives in Toronto, Canada.