Dynamic Decompositions

Students use subtraction algorithms, including when more than 1 decomposition is required and when decomposing 1 unit makes it necessary to decompose a different unit.

By Amplify Classroom

Grades: 3rd Grade

Subject: Math

Learning goals: Today’s Goals • Build fluency to subtract within `1,000`, including when more than 1 unit needs to be decomposed. • Language Goal: Justify when it is necessary to decompose a unit to subtract by place. (Speaking and Listening) Materials Classroom materials: Subtraction Algorithms chart (from Lesson 11); Manipulative Kit: base-ten blocks (as needed)