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.

00:00

- =

Press the Start Button To Begin

You have 0 correct and 0 incorrect.

This is 0 percent correct.

Play

Game Name Description Best Score
How many correct answers can you get in 60 seconds? 0
Extra time is awarded for each correct answer.
Play longer by getting more correct.
0
How fast can you get 20 more correct answers than wrong answers? 999

Explore