Picnic Fun : Hot Dog Operations

"A picnic is a great way to spend a summer day. When friends and family get together for one, there is sure to be summer fun. Before you eat, you need to plan. How many people will be there? Can you figure out how many hot dogs you will need? In this book, you'll learn how to add and subtract to find the right number of hot dogs for a perfect picnic! Concepts of addition and subtraction are introduced in various ways such as a ten frame, linking cubes, and counting on or back."