# 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 ,
• 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.