For example, estimate 12.93 + 6.1 to be 19. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

A large collection of teacher resources dealing with decimals at many different levels. There are worksheets, PowerPoints, smartboard presentations, Excel, Word, and pdf files for the teacher's use.

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...

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...

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.