1+ 1= 5 and Other Unlikely Equations
illustrated by Brenda Sexton
Sterling Children’s Books, 2010
ages 5 to 12, ISBN 978–1‑4027–5995‑6
Find this book at your local library or favorite used bookseller.
So you think 1 + 1 = 2? After reading this book, you won’t be so sure.
With a mix of math and creative thinking, 1 + 1 can equal 3, 13, or even 110. It all depends on what you’re adding!
Students in kindergarten through fifth grade have come up with their own creative 1 + 1 equations. What do YOU think 1 + 1 equals?
You and your students can explore the world of numbers and creativity with this fun and useful teaching guide in color for 1 + 1 = 5 and Other Unlikely Additions. If you’d like to print the teaching guide in black-and-white, we’ve provided it that way, too.
Looking for even more ways to celebrate numbers and imagination? Here’s a Number Hunt word search that is also a matching quiz.
Who knows what lurks behind these mild-mannered numerals when your students put their artistic skills to work discovering The Secret Life of Numbers.
Get out your crayons and markers and get reading for this Coloring Sheet from 1 + 1 = 5.
And after your students tackle some of the challenges above or in the teaching guide, you can reward their efforts with this Creativity Certificate.
Awards and Recognition
Book Links Lasting Connection
Grand Canyon Reader Award
Minnesota Book Award finalist
Texas 2x2 Reading List
“For those who think math problems only have one right answer, this playful book offers a surprising number of solutions to 1+1. In one scene, a man and a cat push a wheelbarrow containing a pumpkin and watermelon. “1+1=hundreds?” asks a banner. The reasoning appears on the following page: “1 pumpkin + 1 watermelon = hundreds of seeds!” In another, the sun and moon grin at one another (“1+1=1?”). The explanation: “1 a.m. + 1 p.m. = 1 day!” An energetic and inventive spin on addition. Ages 5–up.” (Publishers Weekly)
“A great way to encourage outside-the-box thinking.” (School Library Journal)
“… the engaging situations will make kids count and think.” (Booklist)
“LaRochelle’s text is thought-provoking, while Sexton’s illustrations kick up the comedy a few notches.” (Karen MacPherson, The Seattle Times)
“Bright, geometric illustrations nicely bordered and framed make every page fun to turn, and add a sense of order to the boundless imagination that this book will inspire.… Easily one of the most inventive books of the year.” (Esme Raji Codell, planetesme.com)