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## Rounding and Estimating - CCSS 3.NBT.A.1

 1. Basket Math. Click Image to Enlarge Practice rounding numbers. For each correct answer a basket [basketball] is made. SEE MORE 2. Comparison Estimator. Click Image to Enlarge Compare the two sets of objects and answer the problem being asked. Less than or Greater than exercise. SEE MORE 3. Estimating and Rounding Decimals. Click Image to Enlarge 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. SEE MORE 4. Estimating by Rounding. Click Image to Enlarge Addition with regrouping. Estimate the sum to the nearest thousand. SEE MORE 5. Estimating by Rounding. Click Image to Enlarge Subtraction with regrouping. Estimate the difference between the two Numbers. SEE MORE 6. Estimating Sizes of Objects. Click Image to Enlarge Guess which length or distance applies to the object. (Has sound) SEE MORE 7. Estimating Sum. Click Image to Enlarge Estimate the sum by front end estimation.(No hints or clues given.) SEE MORE 8. Estimation Valley Golf. Click Image to Enlarge Complete the course using estimation skills in as few strokes as possible.(Can be played on iPad or Tablet.) SEE MORE 9. Estimator. Click Image to Enlarge Practice estimation skills by determining the number of objects, length, or area. SEE MORE 10. Guess the Number. Click Image to Enlarge Developing skills in halving and estimation. SEE MORE 11. Home Run Derby Math. Click Image to Enlarge You don't have time to add, just estimate the correct answer. This is a perfect game for reinforcing number sense and estimating sums, differences, and products of four and five digit numbers. SEE MORE 12. Let's Go Shopping. Click Image to Enlarge Estimate by rounding to the nearest dollar as they shop.  SEE MORE 13. Maximum Capacity. Click Image to Enlarge 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.(Can play on iPad or Tablet.)  SEE MORE 14. More or Less Estimator. Click Image to Enlarge Provides a quantity and you have to estimate whether the set of objects are more or less than the number given.(2 Levels) SEE MORE 15. Round 2-Digit Whole Number to Nearest Ten. Click Image to Enlarge Online quiz that is self checking. SEE MORE 16. Round 3-Digit Whole Number to Nearest Hundred. Click Image to Enlarge Online quiz that is self checking. SEE MORE 17. Round 3-Digit Whole Number to Nearest Ten. Click Image to Enlarge Online quiz that is self checking. SEE MORE 18. Round About. Click Image to Enlarge Estimate by rounding.  SEE MORE 19. Rounding Decimals/Whole Numbers. Click Image to Enlarge Round the decimal to the nearest whole number. Java Games: Flashcards, matching, and concentration.(from Quia)  SEE MORE 20. Rounding Numbers. Click Image to Enlarge Round the number to the nearest ten. SEE MORE 21. Rounding Off. Click Image to Enlarge Round off numbers to the nearest 10 100, or 1000 so that Hypatia can give Pythagoras a grilling! Three levels are available in this game. (Uses Shockwave player) SEE MORE 22. Rounding to nearest thousand. Click Image to Enlarge Round the number to the nearest thousand. SEE MORE 23. Rounding to the Nearest Hundred. Click Image to Enlarge Round the number to the nearest hundred. SEE MORE

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