Practice using a number line to round decimal numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Round decimals using number lines. Select numbers that round to a given value. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Round decimals and whole numbers to the nearest thousand, hundred, ten, one, tenth, or hundredth. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

A good introduction to decimals, which includes a definition of place value and several examples of decimal numbers. Follow links at the bottom of this page to access decimal worksheets as well as information on rounding numbers, adding...

[Free Registration/Login Required] Instruction, activity, and assessment are all covered in this flipchart on how to round numbers to different place values.

This site explains how to round whole numbers to the nearest thousand. Gives practice and games to master this skill.

This site explains how to round whole numbers to the nearest hundred thousand. Gives practice and games to practice this skill which are fun and helpful on the subject.

College professor Dan Bach offers a review of various basic topics in arithmetic, pre-algebra, and algebra. Order of operations, exponents, square roots, variables, and combining terms are just a few of the many topics covered.

This site gives many different summation formulas and their expansions. Very Comprehensive site

This site from the University of California provides a lengthy and intelligent discussion of sig figs, absolute and relative precision, accuracy, precision in calculations, rounding off, and the whole shooting match of how we report what...

Practice estimating quotients then comparing.

Students will play learning games to explore expanded notation and angles such as identifying, measuring, and estimating. They will also convert Roman numerals into numbers.

This lesson plan helps students explore the mathematical concept of area and features resource links to further learning. CCSS.Math.Content.3.MD.C.7.a Find the area of a rectangle with whole-number side lengths by tiling it

Students can brush up on percentage skills with this lesson and calculate percentages using the "Percent Tricks method." For students to successfully use this method, they must have the ability to multiply and divide whole numbers.

A guided lesson explaining how to add and subtract numbers expressing the answer with the appropriate number of significant digits.

A brief presentation helping the learner understand how many significant figures to use when adding numbers.

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

This site explains how to estimate differences by rounding. Games and exercises are provided to practice the skill.

On this interactive site students learn to round numbers to the nearest ten thousand, determine the place value of any digit, and use ordinal numbers.

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

Round money to nearest whole dollar amount.

Teachers can assess students' knowledge of place value with these printable worksheets. You can even create your own learning exercise or flashcards.

From basics such as adding and subtracting money, converting coins, and making change to more advanced topics such as sales tax and simple interest, this interactive tutorial offers help with consumer math issues.

This word problem quiz will require you to make estimations based on the given information.