## Make reasonable estimates of fraction and decimal sums and differences. 0506.2.5

## Links verified on 9/15/2014

- Comparison Estimator - Similar to Estimator but compares two sets of objects.
- Computation and Estimation - use common fractions, decimals, and benchmarks in a game context to estimate the sum of chosen fractions and determine if the sum is closer to 0, 1, or 2 [5 page document includes game cards] [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.]
- 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
- Estimate - (use as a whole class activity) Select a range, display tick marks and estimate before revealing the answer.
- Estimate Fractional Distance - watch Grammy carefully and estimate the fractional distance that represents where she jumped over the hedge
- Estimation Valley Golf - Estimate answers to problems and putt your way into a championship!
- Estimator - Practice estimation skills by determining the number of objects, length, or area. (parameters: error tolerance)
- Fraction Game - an applet which allows students to practice working with relationships among fractions and ways of combining fractions
- Guess the Number - developing skills in halving and estimation
- Let's Go Shopping - estimate by rounding to the nearest dollar as they shop
- More or Less Estimator - Similar to Estimator activity but states a quantity and asks the user to estimate whether the set of objects is more or less than the number given.
- Round About - estimate by rounding
- That's Right - estimate measurements in real-world problems using money
- Weigh the Wangdoodles - Your job is to find the weight of each Wangdoodle using the information provided by the scales. To be successful, you will have to make sure that the weight you assign to each Wangdoodle works on each scale. This activity is a fun but challenging introduction to multiple algebraic equations.

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