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 Home--maths--Fourth Grade--Estimate the sum of two decimals

Estimate the sum of two decimals

Estimate the sum of two decimals

How to Estimate a sum by rounding.

  • Round each decimal term that will be added.
  • Add the rounded terms

Example: Estimate the sum of 0.988 + 0.53

  • Round 0.988 + 0.53 to 1 + 0.5
  • Add the rounded numbers to obtain the estimated sum of 1.5
  • The actual sum of 0.988 + 0.53 is 1.518

Some uses of rounding are:

  • Checking to see if you have enough money to buy what you want.
  • Getting a rough idea of the correct answer to a problem

Estimate the Sum of the decimals.

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2006-11-19 13:03:19
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