Sharing Ideas

Students subtract within `1,000` by place, decomposing hundreds and tens when necessary, and compare representations. Note: Activities 1 and 2 were updated in the Teacher Edition PDF and in the Teacher Presentation Screens on 1/12/2026.

By Amplify Classroom

Grades: 2nd Grade

Subject: Math

Learning goals: Today’s Goals • Use place value understanding to subtract within `1,000`, decomposing hundreds and tens when necessary, and show thinking. • Language Goal: Explain place-value based strategies for subtracting within `1,000`. (Writing, Speaking, and Listening) • Language Goal: Compare how base-ten diagrams and equations can be used to represent subtracting by place. (Speaking and Listening) Materials Manipulative Kit: base-ten blocks; Classroom materials: Three-Digit Place Value Mats (from Unit 5)