# Lesson 4

Dive Back Into Division

### Lesson Purpose

The purpose of this lesson is for students to estimate and find whole-number quotients with up to four-digit dividends and two-digit divisors.

### Lesson Narrative

In previous units students learned how to find whole-number quotients of whole numbers with up to four-digit dividends and two-digit divisors. They used strategies based on place value, properties of operations, and the relationship between multiplication and division. In this lesson, students apply these understandings as they decide if a quotient is reasonable and write division expressions for a given quotient. If students need additional support with the concepts in this lesson, refer back to Unit 4, Section B in the curriculum materials.

• Action and Expression

### Learning Goals

Teacher Facing

• Find whole-number quotients of whole numbers with up to four-digit dividends and two-digit divisors.

### Student Facing

• Let’s estimate and divide.

### Lesson Timeline

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

### Teacher Reflection Questions

In tomorrow’s lesson, students revisit an algorithm for division that records partial quotients. How did the mathematics in today’s lesson prepare students for using the partial quotients algorithm?

### Print Formatted Materials

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