# Lesson 7

Numbers Within 100,000

### Lesson Purpose

The purpose of this lesson is to read, write, and represent multi-digit numbers up to the ten-thousands.

### Lesson Narrative

In this lesson, students count to read and write multi-digit numbers up to the ten-thousands place. They also count to develop a sense of the magnitude of 10,000. In the previous lesson, students counted by thousands and created 10 groups of 1,000 to make 10,000. This continues to build awareness of the structure of our number system with the base of ten (MP7). In this lesson, students practice writing numbers up to 100,000, which sets the stage for 100,000 as a new unit in base-ten in the lessons that follow.
• Representation
• MLR8

### Learning Goals

Teacher Facing

• Represent, read, and write multi-digit whole numbers to the ten-thousands.

### Student Facing

• Let’s read, write, and represent multi-digit numbers.

### Lesson Timeline

 Warm-up 10 min Activity 1 20 min Activity 2 15 min Lesson Synthesis 10 min Cool-down 5 min

### Teacher Reflection Questions

What did you see or hear that surprised you about students’ sense of multi-digit numbers? What question do you wish you had asked today that would have provided great insight into student thinking?

### Suggested Centers

• Greatest of Them All (1–5), Stage 2: Three-digit Numbers (Supporting)
• Mystery Number (1–4), Stage 4: Fractions with Denominators 5, 8, 10, 12, 100 (Supporting)