Estimate Difference of Decimals

Estimate Decimal Difference with Rounding: Learn

How to Estimate a difference by rounding:

  • Round each term that will be subtracted
  • Subtract the rounded numbers

Example: Estimate the difference of 0.988 - 0.53

  • Round 0.988 - 0.53 to be 1 - 0.5
  • Subtract the rounded numbers to obtain the estimated difference of 0.5
  • The actual difference of 0.988 + 0.53 is 0.458

Some uses of rounding:

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

Estimating with Rounding: Practice

Estimate the difference by rounding the two numbers.


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