This packet is a resource that can be used to help teach and assess the students knowledge of how to decompose the second addend of a 3 digit subtraction problem, to subtract. This can be used as a whole group lesson or you can have your students do this individually in class or as homework.

The math this worksheet is asking the students to complete is taking apart the second addend in an expanded form, then subtracting the expanded form elements from the first addend. This worksheet assesses the students knowledge of expanded form and how to solve multi-step problems.