Primary maths: Decimals

Sian Evans
07th February 2018
Primary pupils tackling decimals in their primary maths lesson

Delve into the world of decimals with this engaging collection of ready-to-use resources

Before getting to grips with converting decimals, percentages and fractions, it’s important to give your class a solid understanding of how decimals work in their own right. That’s why we’ve selected some of the very best approaches to teaching decimals, all created by the Tes community. What are you waiting for?

Classroom activities

There’s no point in trying to captivate your classes with dull repetitive tasks when you could be challenging them to think in different ways, using their imagination and stretching themselves. Here are just a few ideas to keep your class engaged.

 

Multiplying Decimals

Based on White Rose Maths Scheme and TES recommended.

Included in this pack is:

3 worksheets based on the White Rose Schemes varied fluency and reasoning questions - including representing the question as a visual, missing digits and worded problems.

4 differentiated worksheets on multiplying and dividing by 10, 100, 1000.

An additional resources which is a teachers notebook that links to 3 differentiated worksheets. Two and Three star worksheets contain 'achieve, challenge and aspire' elements.'

Achieve - Arithmetic questions linked to SLW: Children should move to one star sheet if they are not secure with these questions.

Challenge - Reasoning questions that relate to other areas of the curriculum, whilst also focusing on fluency when multiplying decimals.

Aspire - Challenging worded problems.

We hope you find these worksheets useful and save you time planning. We aim to produce resources which are of the highest quality - we strongly believe that the visual aspects of these worksheets enable deep understanding of the areas being taught. Once you have used these resources, we would love to hear what worked particularly well and what could be improved on: we often edit our resources.


Thank you for taking your time to browse this resource!

@mathsteryed
By MathsteryEducation

Addition and subtraction of decimals

This worksheet and problem cards will help students deepen their understanding of addition and subtraction of decimals.
By WRMaths

Decimal Multiplication Codebreaker Sheet

Engaging code breaker activity in which pupils work out the decimal multiplication questions for each letter and decode the hidden joke. Answers sheet included.

The joke should read "What is a butterfly's favourite subject? Mothematics!"
By prof689

Decimal sequences

3 worksheets looking at sequences of decimal numbers.
By saz0885

Lesson ideas

Outline the basics and explain the ways that calculations with decimals work with help from these informative presentations. These visual demonstrations are ideal for squashing any confusion or common misconceptions.

 

Introduction to decimals

This is a set of resources I designed for a low ability year 7 group I teach to introduce the concept of decimals and their size and different ways of displaying them. I focus mainly on one and two decimal place numbers. It could lead to work on ordering decimals.
The student sheet is designed for them to fill in with place value and examples. There is then a shading sheet for tenths and one for hundredths. Finally there are some cards which contain 9 different 1 and 2 decimal place numbers where pupils have to sort into their groups - decimal number version, shaded version (using a 10x10 grid), number line version and a version where the decimal is spelled. This could develop into understanding that, say, 0.4 is larger than 0.18 - a common misconception.
There is a powerpoint attached that works through all this.
Happy to send powerpoint in earlier version or the worksheets in word to allow editing if you want.
Let me know how you get on with them.
I have a website, mrchadburn.co.uk which I'm hoping to upload this and other resources. Please keep visiting as it develops and comments, criticisms keenly accepted.
By alexsabella

Rounding Decimals KS2

A Powerpoint to explain Rounding Decimals. This powerpoint has 18 slides (Including one title and one end slide). Designed for KS2.
By Magictrickster

KS2/KS3 Maths: Place Value and Ordering Decimals

1. Includes a PowerPoint and a worksheet designed to allow all pupils make progress and grain a full understanding of decimal place value.
2. Decimal place value: Tenths, hundredths and thousandths.
3. Highly visual approach to teaching and learning decimal place value.
By Fintan Douglas

Decimal Addition

A powerpoint which explains how to add decimal numbers.
By bubsdasanjh

Games

Consolidate understanding with a fun twist using this collection of competitive games, puzzles and challenges. Go on, try one out in your classroom today…

 

Build an Army: Decimal Arithmetic

“Build an Army” is a fun, strategy game that can be used to consolidate understanding of key mathematical concepts. After students have played the game and described their strategy, there are opportunities for differentiation via various lines of inquiry and probing questions for the students to investigate. Full instructions are provided in the “General Rules” PowerPoint. To find more Build an Army activities, just visit: http://www.mrbartonmaths.com/buildanarmy.htm
By MrBartonMaths

Decimal Bingo

This decimal bingo game gives children lots of practice adding decimals and doesn't feel like it relies too much on luck. The children can use a host of mental math strategies while playing; so it's not just a 'hunt and cover' game. The pdf file includes two sets of 6 game boards. One set uses numbers to only one decimal place, the remaing set stretches to two decimal places. There are nine different 'target' cards displaying a 'Bingo number' of either 1, 1.5 or 2. Each child has their own 'Decimals bingo board' and a set of counters. Each 'Decimal board' displays a set of 14 decimal numbers. The game plays like normal bingo except that playrs cover two numbers on each go - the numbers which give a total of the bingo number drawn. Full details (and illustrations) are on my www.mathsticks.com website.
By Johdu

Decimal Snakes and Ladders Board Game

This is available as part of a bundle

This is a simple and effective board game that allows the practice and reinforcement of the concept of decimal values. The pack includes 5 different boards, two with snakes and ladders, three without. Three boards that work with a typical 10-sided dice, or the included printable spinner, and two boards that will work with a typical 6-sided dice only.

Full set of rules included for many different game types to address a number of different requirements for the learning of decimals. You can view the game rules by downloading the product preview now.

If printed in full-colour, and laminated, the game will last for a very long time. The construction of this product is professional and clear and looks beautiful on thick card.

You may also like:
Fraction, Decimal and Percentage Worksheets
Fractions, Decimals and Percentage Matching Activity
Fractions, Decimals and Percentage Clip Cards
By LittleStreams

Decimals Place Value

Fun, popular and differentiated 4 in a row board games and a Tarsia jigsaw puzzle (in PDF) for consolidating understanding of place value in decimals (1, 2 and 3 decimal places). Originally designed for Key Stage 2 (KS2) - Year 5 / 6 (P6 / P7).

FOUR IN A ROW:

• Two sets of 54 decimal number cards featuring numbers from 0.001 to 2.01 (1 set includes numbers up to 2 decimal places, the other up to 3 decimal places)

• Two A3 Four in a Row boards. The 1 star version was originally designed to go with the cards to 2 decimal places, while the more challenging 2 star version was designed for the cards to 3 decimal places. However, both sets of cards would work with either board. It works especially well in A3, however, you could scale down the board and cards should you not have the ability to print in A3. Alternatively, use the A4 Three in a Row boards which are also included.

You could have pairs take on other pairs. Each team of two starts with a set of cards (print each set on different coloured card or paper and then laminate). It works well if each team shuffles their cards, puts them in a pile and takes one from the top at a time, which they then put down on the board if there's a suitable empty box. They aim to get four of their cards in a row (or 3 if using the smaller boards). Each box has a stipulation about the numbers that can be placed on it (no tenths, < 1.5, > 0.31, < 0.56, five hundredths etc). To save printing you could split a set between 2 or 3 boards as a single team won't require all 54 cards.

The cards can also be used separately from the game boards for ordering activities. Cards and boards are editable should you want to make changes to better suit the needs of your pupils.

PUZZLE:
Print and laminate the big puzzle pieces. It features addition of decimal numbers, tenths, hundredths etc. The calculations and answers are designed to be similar so pupils have to think carefully about which answer matches which calculation. Once assembled it makes a larger triangle. A solution is included in a separate file.

You can get this alongside other KS2 place value activities in the bundle below.

Other popular KS2 Maths / Numeracy resources:
Mental Maths Bundle
Multiplication / Division Bundle
Angles / Symmetry Bundle

For time-saving printables and presentations to plan Primary Literacy, Maths and French lessons: FullShelf Resources
By FullShelf

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