Estimating Sums and Differences of Decimals is one of thousands of math lessons at MathHelp.com.

Estimating Sums and Differences of Decimals

We offer a complete lesson on Estimating Sums and Differences of Decimals with a personal math teacher.

  • video examples
  • guided practice
  • interactive self tests
  • printable worksheets and more

Lesson Description:

Students learn to estimate the sum or difference of two decimals by first rounding each decimal to the nearest whole number, then adding or subtracting. For example, to estimate the sum of 4.94 and 2.185, round 4.94 up to 5, and round 2.185 down to 2, to get 5 + 2, which equals 7.