One plus one has always been two in our eyes. This books changes that concept a bit. I thought it was cute because it makes you think. I first thought that this book was going to be a little silly, but once I started reading it I was laughing. One plus one does not always equal two! An example of this would be "one ant plus one spider equals fourteen legs"! I think this is a great book to use with children when introducing addition to students. David LaRochelle did a good job making this book funny and enjoyable, especially a math book one of the most unlike subjects. ( )

1+1=5 as the title of the book is immediately eye-catching. When someone is asked to provide an answer to 1+1, almost always the answer is 2. This book is very fun to read. It encourages young readers to think beyond the obvious. It is a good introduction to using math in terms of logical thinking. For example, 1+1+5: 1 set of triplets + 1 set of twins = 5 babies.
This is a short book that centers around the different ways that 1+1 can equal wacky numbers. The illustrations are done in very vibrant colors. Animals are anthropomorphized. The endpages also have illustrations that make the entirety of the book appealing to a young reader (grades 1-3). Each page has very little text. On the right page of the book, readers are presented with a 1+1=# puzzle. Turn the page and the solution is given. My reaction at each solution is "wow! I did not think of that." Although the book is geared towards very young readers, I can see using this book in my 9th grade geometry class. On the first few days, when I am introducing logic and patterns, I could have this read aloud and then have the students brainstorm different ways to solve the 1+1 puzzle.
The author is an elementary school teacher and illustrator has extensive experience with children's books. The collaboration between David LaRochelle and Brenda Sexton created a very entertaining educational book. ( )

This book has colorful illustrations, and seems like a fun way to help kids think outside the box when it comes to math. ( )

This lively picture book asks kids to figure out how 1 1 can possibly equal 3... or 110... or 13. All of the answers are possible, and 2nd and 3rd graders who are comfortable with basic addition will quickly grasp that the clues are in the illustrations if they look hard enough. A fun way to help kids think beyond the obvious. ( )

This is a very silly book. Math is stressful and scary for some children. This is another funny way to introduce math. This is an addition book with math problems that give silly and fun answers. ( )