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Lesson Plan: Estimating Products: Numbers up to 20

This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to estimate the products of one-digit numbers and teen numbers as well as estimate the products of three one-digit numbers.

Objectives

Students will be able to

  • use rounding and related close facts to estimate the product of a one-digit number and a teen number,
  • use rounding and related close facts to estimate the product of three one-digit numbers,
  • use the associative property to estimate the product of three one-digit numbers,
  • estimate products in word problems.

Prerequisites

Students should already be familiar with

  • multiplication facts through 10×10,
  • how to use estimation methods such as rounding,
  • basic concepts of multiplication,
  • how to multiply a number by 10.

Exclusions

Students will not cover

  • algorithms for finding products involving two-digit numbers,
  • finding exact answers to multiplication problems.

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