# Lesson 18 Lots of Milk

Let’s make estimates with big numbers.

## Warm-up Estimation Exploration: How Big is the Milk Carton?

What is the volume of the milk carton in cubic inches?

Record an estimate that is:

too low | about right | too high |
---|---|---|

## Activity 1 Milk for Everyone

In each situation, estimate the volume of milk, in cubic inches, that you or the group would drink in one day. Explain your reasoning.

you

your class

your grade

your school

10 schools

## Activity 2 How Big is 1,000,000?

Estimate the number of days it would take each group to drink 1,000,000 cubic inches of milk. Explain your reasoning.

10 local schools

your school

your grade

your class

you

## Practice Problem

## Problem 1

There are 418 students at a school. Han estimates that they each drink about 5 glasses of water each day.

About how many glasses of water do all of the students together drink in one day?

About how many glasses of water do all of the students together drink in one week?

About how many glasses of water do all of the students together drink in one month?

About how long do you think it would take all of the students to drink 1,000,000 glasses of water?