Use Glencoe's randomly generated self-checking quiz to test your knowledge of estimating sums and differences. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the...

[Free Registration/Login may be required to access all resource tools.] Estimate sums and differences by rounding decimals to whole numbers.

Soccer Math: Estimating is a fun way for kids to practice estimating sums, differences, products and quotients. There are different levels of difficulty in each exercise making the game appropriate for a variety of students and grades....

A guide to support parents as they work with their students in place value, rounding, and algorithms for addition and subtraction.

[Free Registration/Login may be required to access all resource tools.] Round fractions and mixed numbers in order to estimate sums and differences.

[Free Registration/Login Required] This flipchart is designed to teach third grade students the steps in estimating sums and differences. It also reviews rounding numbers to the nearest ten and hundred.

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...

Estimate the sum and difference by rounding whole numbers and decimals.

[Free Registration/Login may be required to access all resource tools.] Round whole numbers in order to estimate sums and differences.

Improve your estimation and rounding skills with these interactive games that are challenging and fun. Excellent skills practice for rounding, estimating sums and differences, and front-end estimation. Links to lesson plans, teacher...

This website from The Math Page explains some helpful hints about how to do mental math.

This interactive worksheet covers a wide range of math concepts such as Roman Numerals, distributive property, estimating sums, and comparing fractions and decimals. Some concepts may be slightly challenging. Learners can access the help...

[Free Registration/Login may be required to access all resource tools.] Use number properties in decimal operations

Front-end estimation is explained and demonstrated with an online game at this AAA Math lesson.