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## Rounding and Estimating

## Links verified on 2/21/2013

- Basket Math - Practice rounding numbers. For each correct answer a basket [basketball] is made.
- Comparison Estimator - Compare the two sets of objects and answer the problem being asked. Less than or Greater than exercise.
- Estimating Sizes of Objects - Guess which length or distance applies to the object.
- Estimating by Rounding - Addition with regrouping.
- Estimating by Rounding - Subtraction with regrouping.
- Estimating and Rounding Decimals - Try answering the 10 problems. If you get at least 8 correct on your first attempt, then you're ready to move on. If not, review the lesson and examples.
- Estimating Sum - No hints or clues given.
- Estimation Valley Golf - Complete the course using estimation skills in as few strokes as possible.
- Estimator - Practice estimation skills by determining the number of objects, length, or area.
- Guess the Number - Developing skills in halving and estimation.
- Home Run Derby Math - You don't have time to add, just estimate the correct answer. [addition, subtraction, or multiplication]
- Laser Beams - Rounding decimals to the nearest whole number. Three levels are available: rounding, rounding and computing sums and differences, and rounding and computing with all four operations.
- Let's Go Shopping - Estimate by rounding to the nearest dollar as they shop.
- Maximum Capacity - Bring as many gorillas as possible to the eighth floor for the annual Gorilla's Ball at the Jungle Hotel! The only problem is, the doors to the ball close in three minutes, and there are still hundreds of anxious gorillas waiting. Check the weight capacity at the top of the elevator. It changes with each trip. Drag the gorillas into the elevator. Drag as many as you can without exceeding the weight capacity. {New 1-30-12}
- More or Less Estimator - Provides a quantity and you have to estimate whether the set of objects are more or less than the number given.
- Round About - Estimate by rounding.
- Round the Decimal to the Nearest Whole Number - Matching, flashcards, or concentration. (from Quia)
- Rounding Off - Three levels are available in this game from BBC Education.
- Rounding to nearest ten
- Rounding to nearest hundred
- Rounding to nearest thousand
- The Seashell Rounding Activity Page - Look at the number on each shell. Click on the nearest ten.

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