Apply and explain alternate methods for subtracting from multiples of 100 and from numbers with zero in the tens place

In this lesson, students apply their understanding of addition and subtraction within 1,000 to complete a variety of problems. They work with three-digit subtraction problems, applying multiple strategies, such as compensation, arrow notation, and chip models to solve. As students apply alternate methods, the emphasis is placed on students explaining and critiquing various strategies.