Unit 3, Lesson 1
Represent Numbers in Different Ways
Grade 3
Preparation
Lesson Narrative
Prior to this grade, students represented numbers within 1,000, using number names, base-ten blocks and diagrams, and expanded form. They used place value to compose and decompose numbers within 1,000.
In this lesson, students revisit these familiar representations and ways of reasoning about numbers as they work to build fluency with addition and subtraction within 1,000. The base-ten diagrams and the expanded form will continue to be used to support students throughout this unit. Give students access to base-ten blocks, in case requested.
- Engagement
- MLR8
- Match (orally) base-ten diagrams, expressions, number names, and three-digit numbers that represent the same value.
- Represent ways to decompose the same three-digit number, using expressions.
- Let’s represent numbers in different ways.
Required Preparation
- Create a set of cards from the blackline master for each group of 2 students.
Teacher Reflection Questions
Whose ideas were shared in class today? How can you leverage each of your students’ ideas to support them in being seen and heard in tomorrow’s math class?