Recognize round-off error and the inaccuracies it introduces. 0706.1.2

Links verified on 6/7/2014

1. Computation Castle - a game that requires the utilization of several math skills: mixed numbers/improper fractions, equivalent fractions, metric conversions, exponents, rounding to the nearest thousands and thousandths and place value
2. Estimating by Rounding - Addition with regrouping - instruction and review, practice, and a quiz and
3. Estimating by Rounding - Subtraction with regrouping - instruction and review, practice, and a quiz and
4. Round About - estimate by rounding.
5. Rounding - Discover how rounding is a process which produces another number that is close to the original number. Learn how to round numbers up or down to the nearest rounding number. Work through the lesson, experiment with the interactive figure and then answer ten questions. [caution: do not submit until you have selected answers to all of the questions] and
6. Rounding Off - Three levels are available in this game from BBC Education [This expired link is available through the Wayback Machine Internet Archive. If the page doesn't load quickly click on Impatient? at the bottom right of the page.]
7. Spy Guys Interactive - Rounding Numbers - Lesson 9