Estimate the Sums
A quick way to estimate the sum of two numbers is to round each number and
then add the rounded numbers. {See yesterday's post for help on rounding.} It is likely that this won't be the exact answer but it
may be close enough for some purposes. Students need this mental math not only for future math classes and math procedures, but it is also a life skill. Were you over charged at the furniture store? Did you receive the correct amount of change back from the waitress?
Tips to introduce your lesson...
How to estimate a sum by rounding:
Tips to introduce your lesson...
- Round each number in the problem.
- Add the rounded numbers together, mental math is even better.
- Check to see if you have about enough money to buy something.
- Get a ball park idea if they have a correct answer to a problem. Is 500 an intelligent answer for 23 + 31?
Need More Rounding to Estimate the Sums Resources?
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| Rounding to Estimate the Sum Center Game | Rounding to Estimate the Sum Task Cards |
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| Rounding to Estimate the Sum Color Your Answers | Rounding to Estimate the Sum BUNDLE |
How about you? Do you have any tips or tricks you would like to share? Please leave them in the comments and I'll also including them in my social media.
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