Lesson: Estimating Products: Decimals by Whole Numbers Mathematics • 5th Grade

In this lesson, we will learn how to use rounding and compatible numbers to estimate the product of a decimal and a whole number.

Lesson Plan

Students will be able to

estimate the product of a decimal and a whole number by rounding to the nearest whole number,
estimate the product of a decimal and a whole number by rounding to the greatest place value,
estimate the product of a decimal and a whole number by using compatible numbers.

Q1:

Estimate .

Q2:

Consider the product .

Estimate the product by rounding each number to its greatest place value.

Calculate the product.

Q3:

We can estimate products by rounding each number to its greatest place value as in the example.

Use this method to estimate the following products.

Estimate .