# Rounding Whole Numbers Teaching Resources

Make rounding whole numbers fun and engaging this school year with the help of printable worksheets, interactive activities and more teacher-created resources created to help students learn how to round to the nearest number.

Aligned with both TEKS and Common Core math, the resources in this collection were all designed by our expert math teachers with your lesson plans and your students in mind. That means you can spend less time creating resources about how to round numbers and more time doing what you really love — teaching!

Explore task cards, Google Slides templates and more ways to teach kids how to estimate, how to put their place value knowledge into practice and how to easily find the closest whole number using practical strategies instead of flashy math "tricks."

Are you new to teaching about rounding in math classes? Or maybe you're just looking for some handy tips and information? Read on for a primer from our teacher team, including a handy definition of round numbers to share with your students.

## What Is a Round Number? A Kid-Friendly Definition

If you're teaching students how to round whole numbers, it helps to start by explaining the meaning of round numbers. Here's a handy definition you can use to introduce your lesson:

A round number is any number that is a multiple of 10 or ends in a zero. Round numbers are helpful when we are making estimations or performing math operations because they make calculations easier.

Examples of round numbers include 10, 20, 100 and 1,000. Each of these numbers is divisible by 10, and each one ends in a zero.

## What Is Rounding a Number? A Kid-Friendly Definition

Once students know what a round number is, it's often easier to explain the meaning of rounding a number.

After all, this math strategy involves simplifying numbers to make them easier to work with.

Rounding a number means to make a number simpler — sometimes making it bigger or smaller — by changing the value to the nearest round number.

For example, if we are rounding the number 38 to the nearest round number, we would change it to 40.

## How to Round to the Nearest Whole Number

When we round numbers, we lean into our understanding of place value to figure out which number to round to. Sometimes we round up, which means we choose a number that is higher in value than our starting number.

Sometimes we round down, which means we round to a number that is lower in value than our starting number.

Either way, we always need to look at the digit to the right of the place value we want to round to. If we want to round to the nearest ten, we look at the ones digit. If we want to round to the nearest hundred, we look at the digit in the tens place, and so on.

*In this fun rounding activity, students draw lines between numbered dog and bones with numbers on them. *

## When to Round Down

How do you know if you should be rounding down? This is fairly simple!

If the digit to the right of the place value we want to round to is 4 or less, we round the number down.

For example:

- If you want to round the number 114 to the nearest hundred, the answer will be 100. This is because we looked to 1 — the digit to the right of the hundreds place.
- If you want to round the number 23 to the nearest ten, the answer will be 23. In this case, we looked to 3 as it was the digit to the right of the tens place.

## When to Round Up

When does rounding numbers require us to increase the value of a number?

If the digit to the right of the place value we want to round to is 5 or greater, we round the number up.

- For example, if you were to round 27 to the nearest tens place, you would end up with 30. This is because 7 is the number to the right of the tens place, and it is greater than 5.

- Free Plan
### Rounding Task Cards

Use place value knowledge to round numbers up through the hundred thousands place with this free set of 20 task cards.

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### Rounding to the Nearest 10 Worksheet

Teach your students to round to the nearest 10 with this printable math worksheet designed for 3rd and 4th grade students.

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### 5-Digit Place Value - Assessment

Assess your students' knowledge of place value to the ten thousands place with this open-ended worksheet.

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### Rounding Numbers - Instructional Slide Deck

Teach the basics of rounding numbers with this engaging and animated PowerPoint.

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### 5-Digit Place Value Warm-Up - Interactive PowerPoint

An engaging 44-slide interactive PowerPoint to use when learning about place value to 5-digits.

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### Roll and Round Dice Game

Help your student refine their rounding skills with this set of 7 printable math games.

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### Rounding to the Nearest 100 Worksheet

Help your students find the correct bone for each dog by rounding to the nearest hundreds place with this math worksheet designed for 3rd and 4th-grade students.

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### Rounding Rainbow – Classroom Poster and Differentiated Worksheet Pack

Download this set of differentiated rounding worksheets and accompanying poster for your math classroom.

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### Rounding to the Nearest Ten, Hundred, and Thousand - Worksheet

Review rounding concepts with a worksheet covering rounding to the nearest ten, hundred, and thousand.

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### Rounding Worksheets - Cut and Paste

Provide your students with engaging practice to help them understand rounding with a set of differentiated worksheets.

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### Number Talks - Building Numbers Task Cards

Build number sense skills with this set of 24 task cards.

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### Exploring 5-Digit Place Value PowerPoint

A 38-slide PowerPoint template to use when exploring place value in the ten thousands place.

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### Owls Round, TOO Matching Game

Practice rounding through to the nearest hundred thousands place with our set of 36 whole number rounding match-up cards.

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### Rounding Numbers Review - Task Cards

Use place value knowledge and reasoning skills to round numbers up through the thousands place with a set of 24 task cards.

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### Goal Getters- Rounding to the Nearest Ten Worksheets

Score a goal and master rounding numbers on a number line with a soccer-themed rounding to the nearest ten worksheet.

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### Rounding Match-Up Activity

Practice rounding decimals and whole numbers with this match-up activity.

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### Rounding to the Nearest Ten - Interactive Activity

Practice rounding two-digit numbers to the nearest tens place with this interactive Google Slides activity.

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### The Case of the Missing Football – Estimating Products Escape Activity for 4th Grade

Uncover the identity of the thief who stole the football with a printable estimating products escape room activity.

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### Rounding to 10, 100, and 1,000 Worksheet - Halloween Color-By-Number

Round each number to the place of the underlined digit with a fun Halloween color-by-number worksheet.

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### Race Up the Rounding Ladder

Challenge your students to have some competitive fun with this partner-based rounding game.

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### Rounding Numbers - Teaching Presentation

Teach your students how to round to the nearest ten and hundred with an interactive, explicit instructional teaching presentation.

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### Bingo Cards - Rounding Numbers Using a Vertical Number Line

Review how to round numbers to the nearest ten, hundred, thousand, and ten thousand with a vertical number line Bingo game.

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### Rounding Numbers on Vertical Number Lines - Matching Activity

Practice rounding to the nearest ten and hundred on a vertical number line with this set of 36 match-up cards.

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### Rounding on Number Lines - Interactive Mystery Picture

Karate chop those rounding standards with a fun Rounding on a Number Line Mystery Reveal activity.

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### Worksheets - Rounding Using a Vertical Number Line

Use a vertical number line to round whole numbers to the tens, hundreds, and thousands place with a pack of differentiated rounding worksheets.

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### Vertical Number Line - Rounding Worksheets

Use a vertical number line to round whole numbers to the nearest ten, hundred, thousand, and ten thousand with a set of rounding worksheets.

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### Rounding Whole Numbers – Word Problem and Error Analysis Worksheet

Solve a variety of rounding word problems and analyze errors with this math worksheet.

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### Rockin' Rounding – Google Slides Interactive Activity

Round numbers to different place values with a Google Interactive activity designed for fourth and fifth-grade students.

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### Rounding Numbers – Math Mazes

Round numbers to various places while finding your way through this set of 5 math mazes.

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### I Have, Who Has – Rounding to 500,000

Use this engaging math game to practice rounding numbers through 500,000 with your students.

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### Rounding Task Cards - Numbers to 100,000

Use place value knowledge and reasoning skills to round numbers up through the hundred thousands place with a set of 24 task cards.

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### Rounding Whole Numbers – Board Game

Engage your students with a lively board game while practicing how to round numbers to a given place.