Estimation

Overview

Your student will be learning:

• rounding numbers is a process for finding the closest multiple of 10, 100, 0.1 and 0.01, of a given number.
• the process of estimation and how it can be a useful tool when checking for a reasonable answer.
• what a compatible number is and how it can be useful.

Example:

252 - 126 = _____

252 is closer to 250

126 is closer to 125

250 - 125 = 125

Resources

• Websites
  • Rounding Numbers: ABCYa.com engages the player in rounding a number to a given place value. This website was also used in the Place Value unit.
  • Glowla's Estimation Contraption: PBSkids.org presents practice estimating sums of 2 and 3 digit numbers.