Engaging story lines and relatable contexts assist readers in understanding the fundamentals of numbers and operations in base ten. Students will learn how to extend the count sequence and gain an understanding of place value in order to apply that understanding to addition and subtraction equations. Age-appropriate text and eye-catching visuals make these concepts easy to understand for beginning math students. Readers will follow an engaging narrative that uses a trip to the ocean as an opportunity to learn about place values, specifically, tens and ones. This volume satisfies CCSS Math Standard 1.NBT.B.2. This book should be paired with Olivia's Ocean Adventure (9781477720370) from the Rosen Math Readers Program to provide the alternative point of view on the same topic.