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Lesson Plan: Front-End Estimation Strategy: Three-Digit Numbers

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to estimate the sum and difference of two three-digit numbers using the front-end estimation strategy.

Objectives

Students will be able to

  • identify the digit with the highest place value in a three-digit number,
  • round three digits to the highest place value,
  • estimate the sum of three-digit numbers by rounding to the highest place value,
  • estimate the differences between three-digit numbers by rounding to the highest place value,
  • reflect on the accuracy of using front-end estimation strategy.

Prerequisites

Students should already be familiar with

  • multiples of a hundred,
  • the three-digit place value,
  • addition and subtraction of three-digit numbers.

Exclusions

Students will not cover

  • other estimating strategies.

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