Interactive
Quia

Quia: Decimal and Whole Number Jeopardy

For Students 3rd - 6th Standards
You can use this web site to compare and round numbers and to also practice rounding whole numbers and decimals. You can just play by yourself or with another player! See how many points you can get.
Interactive
Quia

Quia: Rounding Decimals Whole Numbers Flashcards

For Students 5th - 6th Standards
Use this website to practice rounding decimals to the nearest whole numbers using a flash card format.
Interactive
Quia

Quia: Rounding Decimals Whole Numbers

For Students 5th - 6th Standards
This tutorial-practice has students round decimals to the nearest whole numbers using a matching game format.
Unit Plan
Khan Academy

Khan Academy: Estimate to Add and Subtract Multi Digit Whole Numbers

For Students 1st - 3rd Standards
Use estimation to find a reasonable solution to multi-digit addition and subtraction problems. Numbers are less than or equal to 1000. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...
Unit Plan
Discovery Education

Discovery Education: Web Math: How to Round a Number

For Students 3rd - 5th Standards
This site provides a description and helpful hints on how to round numbers to any place value. Content also includes an interactive problem solver complete with a full description of how the answer was accomplished.
Unit Plan
Khan Academy

Khan Academy: Round to Nearest 10 or 100 on the Number Line

For Students 2nd - 4th Standards
Practice rounding to the nearest ten and rounding to the nearest hundred on the number line. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints....
Activity
The Math League

The Math League: Whole Numbers & Basic Properties

For Students 3rd - 8th Standards
Here is a nice resource for students and teachers about whole numbers and their basic properties. It provides links to information on place value, expanded form, and rounding numbers are just a few of the topics on this page.
Unit Plan
Khan Academy

Khan Academy: Rounding Challenge

For Students 2nd - 4th Standards
Give your brain a workout with these challenge problems on rounding. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints. CCSS.Math.Content.3.NBT.A.1 Use place value...
Unit Plan
Khan Academy

Khan Academy: Write Whole Numbers in Expanded Form

For Students 3rd - 5th Standards
Practice reading and writing numbers written in expanded form. Example: The expanded form of 376 is 300 + 70 + 6. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Activity
K-5 Math Teaching Resources

K 5 Math Teaching Resources: Round to the Nearest Ten [Pdf]

For Students 2nd - 4th Standards
Students will play a game using a deck of cards to further understanding of rounding to ten.
Unit Plan
E-learning for Kids

E Learning for Kids: Math: Elephant Plant: Numbers to 9999

For Students 3rd - 4th Standards
Students will play multiple learning games to explore numbers up to 9999. Games include putting numbers into words, rounding, counting, and dividing.
Unknown Type
McGraw Hill

Glencoe: Self Check Quizzes 1 Rounding Decimals

For Students 5th - 6th
Use Glencoe's randomly generated self-checking quiz to test your knowledge of rounding decimals. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the "Check It" button...
Website
Saddleback College

Algebra2go: Rounding Numbers Problem Sets

For Students 9th - 10th Standards
This resource has three problem sets to practice rounding whole numbers to 10's, 100's and so on, place. Select a problem set, then select a question. Fill in the blank with the correct answer for each problem. When you have answered all...
Activity
Texas Instruments

Texas Instruments: In Round Numbers

For Teachers 6th - 8th
In this activity, students will develop and test rules for rounding whole numbers and decimal fractions. They will use the information to solve real-world problems.
Unit Plan
E-learning for Kids

E Learning for Kids: Math: Movie Theater: Numbers to 9999

For Students 3rd - 5th Standards
On this interactive website students practice various math skills using a real life scenario. Those skills include using words to show four-digit numbers, putting numbers in ascending order, and relating large numbers to everyday life.
Interactive
Quia

Quia: Rounding Decimals Whole Numbers Concentration

For Students 5th - 6th Standards
Use this website to practice rounding decimals to the nearest whole numbers using a concentration game format.
Unit Plan
AAA Math

Aaa Math: Rounding Numbers to the Nearest Thousand

For Students 3rd - 4th Standards
Students can practice rounding numbers to the nearest thousand through a series of self-check exercises and timed learning games.
Interactive
Topmarks Online

Topmarks: Rocket Rounding

For Students 2nd - 6th Standards
A multiple choice game involving rounding numbers to ten, a hundred and to a whole number. There are two options, one with a number line and the other more difficult level, without one.
Unit Plan
AAA Math

Aaa Math: Addition Using Estimation

For Students 5th - 7th
This site explains how to estimate sums by rounding whole numbers. Games and exercises are provided to practice the skill.
Unknown Type
McGraw Hill

Glencoe: Self Check Quizzes 1 Rounding Fractions and Mixed Numbers

For Students 3rd - 8th
Use Glencoe's self-checking quiz to test your knowledge of rounding fractions and mixed numbers. Each question has a "Hint" link to help. Choose the correct answer for each problem, and click the "Check It" button to how you did.
Activity
Beacon Learning Center

Beacon Learning Center: Round About

For Students 1st - 3rd Standards
Students learn about estimation using a number line and rounding rules through this interactive web lesson.
Unit Plan
CK-12 Foundation

Ck 12: Arithmetic: Decimal Comparisons Without Rounding

For Students 7th
[Free Registration/Login may be required to access all resource tools.] Compare and order decimals without using rounding.
Activity
K-5 Math Teaching Resources

K 5 Math Teaching Resources: Round to the Nearest Hundred [Pdf]

For Students 3rd - 4th Standards
Students play a card game with a partner to practice rounding numbers to the nearest hundred.
Professional Doc
Primary Resources

Primary Resources: Rounding Numbers and Estimating

For Teachers 3rd - 5th Standards
A large selection of teacher resources to help teach and review the concepts of rounding and estimating. There are many worksheets and a few PowerPoint presentations.