Monsters can sure eat their fill! In this workbook, you'll learn how to use bar models to solve subtraction problems. Follow the directions and complete all the activities.

A second-grade teacher can teach using bar models in addition and subtraction by introducing the concept through a story problem. For instance, they may explain that if a character has seven apples and buys three more, he will have ten apples. The bar model could visually represent this by showing a bar divided into two parts, one portion representing the seven apples and the other demonstrating the added three apples, with the whole bar symbolizing the total count of 10 apples.