# Lesson 1

Times as Many

### Lesson Purpose

The purpose of this lesson is for students to interpret and represent multiplicative comparison situations using objects and diagrams.

### Lesson Narrative

In previous grades, students learned how to represent additive comparison situations using discrete diagrams, tape diagrams, and addition and subtraction equations that use symbols to represent an unknown quantity. They used these representations to find differences.

In this lesson, students interpret the language of “times as many” in multiplicative comparison situations and connect this language to representations. They learn to recognize the difference between $$n$$ times as many and $$n$$ more. As they create representations using discrete diagrams in which each piece represents one item, students have opportunities to examine any errors in the representations they create and make necessary revisions. Although students may write equations to represent multiplicative comparisons, it is not required here, as they will have an opportunity to explore equations in depth in future lessons.

• Action and Expression
• MLR8

### Learning Goals

Teacher Facing

• Represent multiplicative comparison situations using objects and drawings.

### Student Facing

• Let’s represent situations that involve “times as many.”

### Required Materials

Materials to Gather

Materials to Copy

• Times as Many Recording Mat

### Required Preparation

Activity 3:

• Each group of 2 needs 40 connecting cubes.

Building Towards

### Lesson Timeline

 Warm-up 10 min Activity 1 10 min Activity 2 20 min Activity 3 15 min Lesson Synthesis 10 min Cool-down 5 min

### Teacher Reflection Questions

In this lesson, students had access to connecting cubes to represent “twice as many” and “times as many.” How did students use the cubes to reason about or explain multiplicative comparison? If students did not use the cubes, how did they explain their reasoning?

### Suggested Centers

• How Close? (1–5), Stage 6: Multiply to 3,000 (Addressing)
• How Close? (1–5), Stage 5: Multiply to 100 (Supporting)
• Five in a Row: Multiplication (3–5), Stage 2: Factors 1–9 (Supporting)