# Lesson 8 Round Decimals

Let’s round decimals to the nearest whole, tenth, and hundredth.

## Warm-up Estimation Exploration: Number Line

What number might be represented on the number line?

Record an estimate that is:

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

## Activity 1 Name that Number

## Problem 1

Jada locates 15.53 on the number line. Do you think Jada accurately located the number?

## Problem 2

A number is located between two tick marks on each number line. Label those tick marks and then estimate the number.

## Activity 2 Which Number is Closest?

Round 6.273 to the nearest whole number, tenth, and hundredth. Use the number lines if they are helpful. Explain or show your reasoning.

Round 4.158 to the nearest whole number, tenth, and hundredth.

## Activity 3 Round the Numbers

Round each number to the nearest whole number, tenth, and hundredth.

nearest whole number | nearest tenth | nearest hundredth | |
---|---|---|---|

34.482 | |||

99.909 | |||

5.555 | |||

19.509 |

## Practice Problem

## Problem 1

What is 0.374 rounded to the nearest hundredth? Explain or show your reasoning. Use the number line if it’s helpful.

What is 9.893 rounded to the nearest tenth? What about to the nearest hundredth? Draw a number line if it is helpful.