Perry the Penguin needs 9 clams to buy an ice scooter -- but he's not very good at saving. As Perry earns, spends, finds, loses, and borrows clams, a simple line graph demonstrates the concept of negative numbers.

 

This book features in the following series: Mathstart, Mathstart 3 .

This book is aimed at children in secondary school.

There are 40 pages in this book. This is a picture book. A picture book uses pictures and text to tell the story. The number of words varies from zero ('wordless') to around 1k over 32 pages. Picture books are typically aimed at young readers (age 3-6) but can also be aimed at older children (7+). This book was published 2016 by HarperCollins Publishers Inc .

Stuart J. Murphy is a visual learning specialist with a strong background in design and art direction. He also has extensive experience in the world of educational publishing. Drawing on all these talents, Stuart Murphy brings a unique perspective to the Mathstart series. Jonathan London has written poems and novels as well as the twenty-two books about Froggy. Frank Remkiewicz creates art for greeting cards and posters, and has illustrated all of the Froggy books.