CK-12 Foundation
Ck 12: Arithmetic: Decimal Rounding to Estimate Sums and Differences
[Free Registration/Login may be required to access all resource tools.] Estimate sums and differences by rounding decimals to whole numbers.
AAA Math
Aaa Math: Estimating a Sum by Rounding
Use rounding to estimate the answer to an addition problem in this online game. As you play the game, running totals of correct and incorrect answers and your score are displayed.
Mangahigh
Mangahigh: Number: Estimates and Approximations
Estimate numbers by rounding whole numbers and decimals.
NumberNut
Number Nut: Estimate and Round Why Is This Important?
Problem solving will become a little easier when you understand the concepts of estimation and rounding. Explore how these concepts are used in mathematics and real world applications. Detailed examples and links to related games...
AAA Math
Aaa Math: Estimating a Difference
This lesson explains how to estimate differences between whole numbers. Gives practice and games to practice this skill in a helpful and fun way.
AAA Math
Aaa Math: Estimating a Sum by Rounding
This site explains how to estimate sums of whole numbers. Gives practice and games to practice this skill.
Scholastic
Scholastic: Study Jams! Math: Numbers: Estimate Whole Numbers
This site provides great practice on the concept of estimating and rounding whole numbers. Students can first learn about the topic by watching a step by step instruction video that also points out areas of concern. Finally, students can...
Illustrative Mathematics
Illustrative Mathematics: 4.nbt Rounding to the Nearest 1000
The purpose of this task is for students to estimate the position of numbers less than 10,000 on the number line, to practice rounding, and to make the connection between rounding and location on the number line. Aligns with 4.NBT.A.3.
Scholastic
Scholastic: Study Jams! Math: Problem Solving: Estimate Whole Numbers
This site provides great practice on the concept of estimating whole numbers. Students can first learn about the topic by watching a step by step instruction video that also points out areas of concern. Finally, students can practice...
Math Playground
Math Playground: Estimate the Angle
Practice estimating the angle by sliding the blue "X" button up and down to open and close the angle. See how many aliens you can zap with the correct answer. Your total correct out of 10 is listed just below the problem.
Khan Academy
Khan Academy: Round Whole Numbers Word Problems
Solve word problems by rounding whole numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
CK-12 Foundation
Ck 12: Elem Math: Estimate and Compare Meters and Centimeters? (Grade 4)
[Free Registration/Login may be required to access all resource tools.] This site offers four videos and a set of practice questions on estimating and comparing meters and centimeters using images and descriptions.
CK-12 Foundation
Ck 12: Elem Math: Estimating Measure by Description Multiple Choice
[Free Registration/Login may be required to access all resource tools.] For this learning module, students must choose the best answers to questions about the estimated lengths of objects. Includes video demonstrating a sample problem...
AAA Math
Aaa Math: Subtraction Using Estimation
This site explains how to estimate differences by rounding. Games and exercises are provided to practice the skill.
CK-12 Foundation
Ck 12: Elem Math: Estimating the Measure of Items by Description: Feet or Yards?
[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to estimate the lengths of objects in feet or yards. Includes video demonstrating a sample problem [0:38] and a set of...
CK-12 Foundation
Ck 12: Elem Math: Estimating Measure of Items by Description: In., Ft. Or Yd.?
[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to estimate the measure of objects in inches, feet, or yards. Includes video demonstrating a sample problem [0:36] and a...
Mangahigh
Mangahigh: Data: Estimate the Mean Using Grouped Results
Students watch an online tutorial on the concept of estimating the mean. After watching, students test their knowledge by attempting ten practice problems that increase or decrease in difficulty based on their answers.
TeachEngineering
Teach Engineering: Estimating the Storage Capacity of a Cd/dvd
Students estimate the storage capacity of CDs and DVDs by assessing diffraction patterns of green and red laser beams.
BBC
Bb Ci: Review Significant Digits
BBCi presents a test prep review ("revision") section on significant digits and on approximating an answer by rounding in order to work with an easy number. Click on "Test Bite," on the last page to get an interactive quiz.
Mangahigh
Mangahigh: Number: Estimation
Estimate the sum and difference by rounding whole numbers and decimals.
CK-12 Foundation
Ck 12: Elem Math: Estimating the Metric Lengths of Objects by Image
[Free Registration/Login may be required to access all resource tools.] For this learning module, students must analyze the information they are given about the metric heights of three objects and answer questions that compare them....
University of Cambridge
University of Cambridge: Nrich: Angle A
Sharpen your logic and angle recognition skills by working on this interactive challenge. Solution available.
ABCya
Ab Cya: How Many Marbles?
How Many Marbles is a fun 3D activity for children to practice estimating. Rotate the jar to see the number of marbles from different sides. Estimate the number of marbles by using the arrow keys to answer. How close can you get? This...