# Lesson 10 Estimation Exploration

• Let’s design an Estimation Exploration activity.

## Warm-up Estimation Exploration: No Driver Required

Here are pictures showing the exterior and interior of a parking tower in Wolfstadt, Germany. The parking is automated: each car goes up on a lift and is then placed in a parking space.

How many cars can fit in the tower?

Record an estimate that is:

too low

too high

## Problem 1

Jada brushes for 2 minutes, twice a day. She changes her toothbrush every 3 months.​​​​​​

Based on this information, make some estimates and show your reasoning:

1. How many toothbrushes will she use?

2. How many dollars will she spend on toothbrushes?

## Problem 2

About how many minutes would she spend brushing her teeth:

1. in a year?

## Activity 2 Get Your Classmates to Estimate

It’s your turn to create an estimation problem.

1. Think of situations or look around for images that would make interesting estimation problems. Write down 4–5 ideas or possible topics.

2. Choose your favorite idea. Then:

• Write an estimation question that would encourage others to use multiplication of multi-digit numbers to answer.

• Record an estimate that is:

too low

too high

## Activity 3 Facilitate Your “Estimation Exploration” Activity

Follow these steps to facilitate your Estimation Exploration activity for another group: