teaching resource

Estimation Worksheets (Addition and Subtraction)

Updated: 20 Oct 2023

Teach your students how to use their rounding skills to estimate sums and differences with these maths worksheets.

Editable: Google Slides
Non-Editable: PDF
Pages: 1 Page
Years: 3 - 4

Curriculum

VC2M3N06

Estimate the quantity of objects in collections and make estimates when solving problems to determine the reasonableness of calculations <ul> <li>estimating how much space a grid paper representation of a large number such as 20 200 will take up on the wall and how much paper will be required</li> <li>estimating the number of people in a large gathering (for example, a school assembly) using known numbers (such as how many students per class)</li> <li>choosing which place value they would estimate to for different situations; for example, choosing to estimate to the nearest ten when estimating how many dots on a ladybird or choosing to estimate to the nearest thousand when estimating crowd sizes at a venue</li> <li>checking the reasonableness of an addition calculation by using two- and three-digit numbers to the nearest ten or hundred to estimate; for example, using 200 + 400 = 600 to estimate and check the solution to the calculation 219 + 385</li> </ul>
VC2M4N07

Choose and use estimation and rounding to check and explain the reasonableness of calculations, including the results of financial transactions <ul> <li>using proficiency with basic facts to estimate the result of a calculation and say what amounts the answer will be between; for example, 5 packets of biscuits at $2.60 each will cost between $10 and $15 as 5 × $2 = $10 and 5 × $3 = $15</li> <li>using rounded amounts to complete an estimated budget for a shopping trip or an excursion, explaining why overestimating the amounts is appropriate</li> <li>recognising the effect of rounding in addition and multiplication calculations; rounding both numbers up, both numbers down, and one number up and one number down, and explaining which is the best approximation and why</li> </ul>

teaching resource

Estimation Worksheets (Addition and Subtraction)

Updated: 20 Oct 2023

Teach your students how to use their rounding skills to estimate sums and differences with these maths worksheets.

Editable: Google Slides
Non-Editable: PDF
Pages: 1 Page
Years: 3 - 4

Teach your students how to use their rounding skills to estimate sums and differences with these maths worksheets.

What Is an Estimate?

As students work to strengthen their computation skills, estimation is another topic they will learn about. This can be a tricky concept for young learners because they’ve been working so hard on getting the exact answer for quite some time! With estimation, we are teaching them to answer a problem with a number that is ‘pretty close’ to the right answer.

So, how can we explain what an estimate is to our students? Read on for a simple definition to use with your students!

An estimate is like making a good guess. You can guess the amount of something or the answer to a problem using rounding or compatible numbers.

Imagine you’re trying to figure out how many jellybeans are in a big jar, but you can’t count them one by one. So, you look at the jar and take a guess. It’s not the exact number but a close guess based on what you can see and know. Estimating helps us make quick guesses when we can’t find the exact answer easily.

Estimating Worksheets for Kids!

If you are looking for a printable resource to help your students strengthen their understanding of rounding and estimation, look no further! Teach Starter has created a worksheet bundle to use with your students. Inside this teacher-created resource, you will find 8 worksheets that cover:

Round to the nearest 10 to estimate sums and differences with 2-digit numbers (Standard practice page and word problem page).
Round to the nearest 10 to estimate sums and differences with 3-digit numbers (Standard practice page and word problem page).
Round to the nearest 100 to estimate sums and differences with 3-digit numbers (Standard practice page and word problem page).
Round to the nearest 100 to estimate sums and differences with 4-digit numbers (Standard practice page and word problem page).

How to Get Your Estimation Worksheets

If you are ready to use these estimation worksheets in your classroom, head on over to the green download button! You can choose from the quick-print PDF file or the editable Google Slides option. Please note that if you select the Google Slides option, you will first be prompted to make a copy of the resource to your personal drive before accessing it.

This resource was created by Cassandra Friesen, a Teach Starter Collaborator.

Extra Estimation Activities Coming Right Up!

Don’t stop there! We’ve got more activities and resources that cut down on lesson planning time:

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Curriculum

VC2M3N06

Estimate the quantity of objects in collections and make estimates when solving problems to determine the reasonableness of calculations <ul> <li>estimating how much space a grid paper representation of a large number such as 20 200 will take up on the wall and how much paper will be required</li> <li>estimating the number of people in a large gathering (for example, a school assembly) using known numbers (such as how many students per class)</li> <li>choosing which place value they would estimate to for different situations; for example, choosing to estimate to the nearest ten when estimating how many dots on a ladybird or choosing to estimate to the nearest thousand when estimating crowd sizes at a venue</li> <li>checking the reasonableness of an addition calculation by using two- and three-digit numbers to the nearest ten or hundred to estimate; for example, using 200 + 400 = 600 to estimate and check the solution to the calculation 219 + 385</li> </ul>
VC2M4N07

Choose and use estimation and rounding to check and explain the reasonableness of calculations, including the results of financial transactions <ul> <li>using proficiency with basic facts to estimate the result of a calculation and say what amounts the answer will be between; for example, 5 packets of biscuits at $2.60 each will cost between $10 and $15 as 5 × $2 = $10 and 5 × $3 = $15</li> <li>using rounded amounts to complete an estimated budget for a shopping trip or an excursion, explaining why overestimating the amounts is appropriate</li> <li>recognising the effect of rounding in addition and multiplication calculations; rounding both numbers up, both numbers down, and one number up and one number down, and explaining which is the best approximation and why</li> </ul>

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