# Lesson 18

Lots of Milk

### Lesson Purpose

The purpose of this lesson is to estimate products and quotients using a volume context.

### Lesson Narrative

The purpose of this lesson is for students to use their understanding of multiplication and division to estimate products and quotients. This is the first of several lessons where students use multiplication and division to make estimates of large quantities. All of the lessons except the next one use a context of volume.

Students make estimates about the amount of milk consumed by different groups and the number of days it would take these groups to consume 1,000,000 cubic inches of milk. The estimates are structured to build on one another allowing students to use the associative property of multiplication.

• Representation
• MLR2

### Learning Goals

Teacher Facing

• Estimate products and quotients of whole numbers.

### Student Facing

• Let's make estimates with big numbers.

Building On

### 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

What connections did students make between the different strategies shared? What questions did you ask to help make the connections more visible?

### Suggested Centers

• Mystery Number (1–4), Stage 6: Decimals (Supporting)

### Print Formatted Materials

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