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How to Round and Estimate
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How to Round and Estimate

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  1. How to Round and Estimate I can round whole numbers to the nearest tens, hundreds, and thousands place I can make ballpark estimates I can select and use applications effectively and productively

  2. What are the rules for rounding? Find the digit. Look next door. Five or higher, Add one more. Four or less, Let it rest.

  3. To round to the nearest tens place, find the digit in the tens place: 24 Tens place

  4. “Look next door” 24 “Four or less, let it rest.” • That means the “4” is telling the “2” to rest, and the “4” becomes a “0.” • 24 rounded to the nearest ten is 20

  5. More rounding to the nearest ten Round this number to the nearest ten: 348 “Find the digit. Look next door.” 348

  6. More rounding to the nearest ten Round this number to the nearest ten: 348 “Five or more, add one more.” • The “8” is more than five • Add one more to the “4” 348 350 • The “4” becomes a “5” • The “8” becomes a “0”

  7. Are you ready to try some on your own? • http://www.funbrain.com/tens/index.html Choose from the game box on the right, called “Round Number,” and decide which level you would like to begin. See if you can reach the highest level, “Super Brain.”

  8. How to Round to the Nearest Hundred “Find the digit” 572 Hundreds place “Look next door.” 572

  9. 572 • “Five or more, add one more.” • “7” is more than five • Add one to “5” to make it “6” • Change “7” and “2” to “00” • 572600

  10. Are you ready to try some on your own? http://www.mrnussbaum.com/rounding.htm • Choose a drill on rounding to the nearest hundred, or • Choose a game to play on rounding. You may need to watch a tutorial first.

  11. How to Round to the Nearest Thousand “Find the digit.” 3078 “Look next door.” 3078

  12. “Look next door.” 3078 “Four or less, let it rest” • The “0” is less than four, so the “3” will rest. • The “078” becomes “000” 3078 3000

  13. Are you ready to try some on your own? http://www.mrnussbaum.com/rounding.htm • Choose a drill on rounding to the nearest thousand, or • Choose a game to play on rounding. You may need to watch a tutorial first.

  14. How to Estimate • Watch the instructions on how to play http://www.mrnussbaum.com/maximumcapacity.htm • You may play the game afterwards • Estimation is like rounding to the highest place value digit. 4367 4000