About the Book

This educational children's book, written for elementary school students, teaches a math concept in the form of a rhyming story. Children help the main character, Mikey, and his brother, Frank, solve the mystery behind the door as they learn how to solve math functions (input and output door).  Practice problems with an answer key are also included in the back of the book.    

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Text from Page 2:  

When I place an item through this "input" door,  

it comes out different--sometimes less, sometimes more.   

I would be very grateful if you could kindly lend me a hand,  

and maybe together, we will both understand... 

Text from Page 8: 

If I take my puppies and put in a total of three,  

I receive six puppies from the output door.  How can this be? 

Text from Page 11:

Wait a minute!  Something happens to the numbers before they come out-- 

Can you find what each has in common?  If you know it, please SHOUT!