teaching resource

Estimation With Multiplication (Whole Numbers) Task Cards

Updated: 20 Oct 2023

Supercharge your students’ maths skills! Download our set of fun task cards to practise estimating products of whole numbers.

Editable: Google Slides
Non-Editable: PDF
Pages: 1 Page
Years: 4 - 5

Curriculum

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>
VC2M5N08

Check and explain the reasonableness of solutions to problems, including financial contexts using estimation strategies appropriate to the context <ul> <li>interpreting a series of contextual problems to decide whether an exact answer or an approximate calculation is appropriate, and explaining their reasoning in relation to the context and the numbers involved</li> <li>recognising the effect of rounding addition, subtraction, multiplication and division calculations, and rounding both numbers up, both numbers down, and one number up and one number down; and explaining which estimation is the best approximation and why</li> <li>considering the type of rounding that is appropriate when estimating the amount of money required; for example, rounding up or rounding down when buying one item from a store using cash, compared to rounding up the cost of every item when buying groceries to estimate the total cost and not rounding when the financial transactions are digital</li> </ul>

teaching resource

Estimation With Multiplication (Whole Numbers) Task Cards

Updated: 20 Oct 2023

Supercharge your students’ maths skills! Download our set of fun task cards to practise estimating products of whole numbers.

Editable: Google Slides
Non-Editable: PDF
Pages: 1 Page
Years: 4 - 5

Supercharge your students’ maths skills! Download our set of fun task cards to practise estimating products of whole numbers.

What Does It Mean to Estimate in Maths? – Kid-Friendly Definition!

As students are introduced to the term ‘estimate,’ they often are asked to guess how many gumballs are in a jar or how many blocks are in a box. This helps students to make a reasonable guess of an approximate amount. As students move to different year levels, estimation still, in fact, means to make a close guess or approximation, but this is done with the 4 operations: addition, subtraction, multiplication and division. If you are looking for an easy way to explain the term ‘estimate’ to your students, read on for a simple definition!

To ‘estimate’ means to make a thoughtful guess by rounding or compatible numbers to determine an approximate answer.

Estimation Activities for Your Maths Class

Teach Starter has put together a set of estimation task cards to help your students refine their understanding of estimating products with whole numbers. This set of task cards comes with 24 questions that cover:

Rounding factors
Using compatible numbers
Listing factors that could result in an estimated product
Word problems
Determining which method gives the most accurate answer

This teacher-created resource also comes with a recording sheet for your students to write down their answers and an answer key for quick and easy grading!

Download and Print Your Task Cards

If you are ready for your students to use these task cards when reviewing estimation with multiplication, head on over to the green download button. You will find the quick-print PDF file or the editable Google Slides file here. If selecting the Google Slides option, please note that you will first be prompted to make a copy of the resource to your personal drive before accessing.

Consider printing the task cards on thick card and laminating them to ensure they will last for many years to come! Task cards can be kept in an organiser box, envelope or attached with a binder ring.

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

Extra Resources For Your Estimation Unit!

Don’t stop there! If you are looking for some additional resources to add to your teaching toolkit, check out some of our suggested activities below!

teaching resource

Estimating Products With Decimals Task Cards

Challenge your students to estimate before multiplying decimals with this set of 24 task cards.

teaching resource

Estimating Products of Whole Numbers Matching Game

Guide your students to round the factors to estimate the product with this maths matching game.

teaching resource

Estimation With Multiplication – Differentiated Worksheets

Guide your students to estimate products of whole numbers with this set of differentiated worksheets.

Curriculum

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>
VC2M5N08

Check and explain the reasonableness of solutions to problems, including financial contexts using estimation strategies appropriate to the context <ul> <li>interpreting a series of contextual problems to decide whether an exact answer or an approximate calculation is appropriate, and explaining their reasoning in relation to the context and the numbers involved</li> <li>recognising the effect of rounding addition, subtraction, multiplication and division calculations, and rounding both numbers up, both numbers down, and one number up and one number down; and explaining which estimation is the best approximation and why</li> <li>considering the type of rounding that is appropriate when estimating the amount of money required; for example, rounding up or rounding down when buying one item from a store using cash, compared to rounding up the cost of every item when buying groceries to estimate the total cost and not rounding when the financial transactions are digital</li> </ul>

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