The Skill That Stays With Your Child for Life
Ask any primary school teacher what separates confident maths learners from struggling ones, and they’ll often say the same thing: mental maths.
It’s not about being a genius. It’s about training the brain to work quickly, accurately, and independently — without reaching for a calculator every time.
If your child plays Hit the Button, you’ve already seen this in action. That satisfying rush of answering before the timer runs out? That’s mental maths working. And the more they practise, the sharper their thinking becomes — not just in maths, but across everything they learn.
In this article, you’ll discover:
- What mental maths actually is (and why it’s different from written maths)
- Why it matters so much during KS1 and KS2
- Step-by-step ways to build the skill at home
- Common mistakes children make — and how to fix them
- Practice questions, expert tips, and fun activities
Whether you’re a parent, teacher, or a child who wants to get faster at maths, this guide is for you.
What Is Mental Maths?
Mental maths simply means doing calculations in your head, without writing anything down or using a calculator.
It sounds simple, but it involves a whole set of skills working together: number memory, pattern recognition, quick recall, and logical thinking.
Example:
A child doing written maths might work out 7 × 8 by drawing out a grid or counting in steps.
A child doing mental maths hears “7 × 8” and says “56” — instantly.
That instant recall comes from repeated practice and understanding, not magic.
Mental maths includes:
- Number bonds (pairs that make 10, 20, 100)
- Times tables and division facts
- Addition and subtraction in your head
- Doubling and halving
- Rounding numbers quickly
Why Mental Maths Matters: The Real Benefits
It’s Built Into the National Curriculum
From Year 1 onwards, the UK National Curriculum expects children to develop mental calculation strategies. By KS2, children are expected to add and subtract mentally using large numbers, recall all times tables up to 12 × 12, and apply these facts rapidly in problem-solving.
Mental maths isn’t a bonus skill — it’s a core expectation at every stage.
It Builds Confidence in the Classroom
When a child can answer quickly in class, they feel capable. That confidence spreads. They’re more likely to put their hand up, attempt harder problems, and enjoy maths rather than fear it.
Children who struggle with basic recall often feel left behind — not because they’re not clever, but because slower recall creates bottlenecks when tackling complex problems.
It Strengthens Memory and Concentration
Research in cognitive science shows that practising mental maths strengthens working memory — the brain’s ability to hold and use information at the same time. Children with strong working memory tend to perform better across subjects, including reading comprehension and science.
It Prepares Children for Real Life
Think about everyday situations:
- Counting change at a shop
- Splitting a bill
- Estimating how long a journey takes
- Doubling a recipe
These aren’t calculator moments — they’re mental maths moments. Children who develop this skill early carry it into adult life naturally.
Step-by-Step Guide to Building Mental Maths Skills
Step 1: Master Number Bonds First
Number bonds are pairs of numbers that add up to a given total — usually 10, 20, or 100.
Example: 6 + 4 = 10. If a child knows this instantly, they can also quickly work out 16 + 4, 60 + 40, or 6 + 14.
How to practise: Call out a number and ask your child for its “partner” to make 10. Start with single digits, then move to tens and hundreds.
Mini tip: Use physical objects at first (counters, buttons, coins), then move to purely mental practice.
Step 2: Build Times Tables Gradually
Don’t try to learn all 12 times tables at once. Start with the easiest:
- 2s, 5s, and 10s first
- Then 3s, 4s, and 6s
- Then 7s, 8s, and 9s (the trickiest)
Example: Once a child knows 4 × 6 = 24, they also know 6 × 4 = 24, 24 ÷ 4 = 6, and 24 ÷ 6 = 4. Four facts for the price of one.
Mini tip: Practise in short, daily bursts rather than long sessions. Five minutes every day beats one hour on a Sunday.
Step 3: Practise Adding and Subtracting in Parts
Teach children to break numbers apart to make calculations easier.
Example: 47 + 35
Instead of trying to hold both numbers in your head at once:
- 47 + 30 = 77
- 77 + 5 = 82
This is called “partitioning” and it’s one of the most useful mental maths strategies at KS2.
Mini tip: Encourage your child to talk through their thinking out loud. Saying the steps helps the brain organise them.
Step 4: Use Rounding to Estimate First
Before solving, round the numbers to the nearest 10 or 100 to get a rough answer. Then adjust.
Example: 198 + 47
- Round 198 to 200: 200 + 47 = 247
- Subtract the 2 you added: 247 − 2 = 245
This gives a fast, accurate answer without lengthy written working.
Step 5: Practise Doubling and Halving
These are two of the most powerful mental maths tools, and children often underuse them.
If you know double 14 is 28, you can quickly work out:
- 14 × 4 = double 14, then double again = 56
- 14 × 8 = double that again = 112
Halving is equally powerful for division.
Mini tip: Practise doubles from 1 to 20 until they’re automatic. Then practise halving even numbers to 40.
Easy Tricks and Shortcuts
The ×9 finger trick: Hold out both hands. To work out 9 × 4, fold down your 4th finger. You’ll see 3 fingers on the left and 6 on the right: the answer is 36.
Adding 9: Instead of adding 9, add 10 and subtract 1. 53 + 9 = 53 + 10 − 1 = 62. Much faster.
Multiplying by 5: Multiply by 10, then halve the answer. 16 × 5 = 160 ÷ 2 = 80.
Near doubles: 6 + 7 = double 6, plus 1 = 13. Or double 7, minus 1 = 13. Same answer, quicker route.
Counting on from the larger number: For 3 + 14, always start from 14 and count on 3, not the other way round.
Common Mistakes and How to Fix Them
1. Trying to memorise without understanding Children recite times tables like a song but can’t apply them. Fix: ask them to explain why 6 × 7 = 42, not just recall it.
2. Starting from the smaller number when adding 3 + 19 becomes counting 3, 4, 5… Fix: always count on from the bigger number.
3. Forgetting related facts A child knows 3 × 8 = 24 but doesn’t realise 24 ÷ 8 = 3 follows from it. Fix: always teach multiplication and division together as a family of facts.
4. Rushing without checking Speed practice is good, but wild guessing is counterproductive. Fix: encourage a “think first, then answer” habit before the habit of guessing.
5. Practising in only one way Repeating the same method gets boring and doesn’t build flexible thinking. Fix: mix up written, verbal, and game-based practice (more on this below).
6. Skipping the tricky tables Children often skip 7s, 8s, and 9s because they’re harder. Fix: spend extra time on these and reward effort, not just correct answers.
7. Practising infrequently Occasional cramming doesn’t build automaticity. Fix: short, daily practice is far more effective than long weekly sessions.
Fun Ways to Practise at Home and in Class
At Home:
- Car journeys: Call out random multiplication questions and keep score
- Shopping: Ask your child to estimate the total before reaching the checkout
- Cooking: Double or halve recipe quantities together
- Card games: Use a deck of cards for quick-fire addition and multiplication challenges
In the Classroom:
- Whiteboard rounds: Silent, simultaneous answers on mini whiteboards
- Beat the teacher: Children try to answer before the teacher can count to three
- Maths relays: Teams pass answers down a line — one question each
- Daily warm-ups: Five quick mental maths questions to start every lesson
Real-Life Connections:
- Time problems: “If we leave at 2:45 and the journey takes 35 minutes, when do we arrive?”
- Money: “I have £5. This costs £3.47. What’s my change?”
- Sport: “If each team scores 3 points per round and there are 7 rounds, who wins?”
Practise Mental Maths with Hit the Button
One of the best ways to build mental maths speed is through Hit the Button — an interactive maths game designed specifically for KS1 and KS2 learners.
Here’s why it works so well:
Speed practice with real feedback The game gives children a set time to answer as many questions as possible. This builds the habit of quick recall without anxiety — it’s a game, not a test.
Every key skill in one place Hit the Button covers number bonds, times tables, division facts, doubling, halving, and square numbers — exactly the areas the National Curriculum focuses on.
Immediate results build confidence Children can see their score improve session by session. That visible progress is motivating in a way that worksheets rarely are.
Perfect for short sessions A single Hit the Button round takes around one minute. Even five minutes a day — three or four quick rounds — is enough to see improvement over a few weeks.
Try setting a weekly challenge: can your child beat their own best score? That personal competition is often more motivating than competing with others.
Practice Questions
Try these without a calculator. Answers are at the bottom.
- 7 × 8 = ?
- 45 + 37 = ?
- 100 − 64 = ?
- Half of 96 = ?
- 9 × 6 = ?
- 13 + 28 = ?
- Double 47 = ?
- 72 ÷ 8 = ?
- 6 + ? = 15
- 4 × 7 = ?
- 125 − 60 = ?
- 3 × ? = 27
Answers: 1) 56 | 2) 82 | 3) 36 | 4) 48 | 5) 54 | 6) 41 | 7) 94 | 8) 9 | 9) 9 | 10) 28 | 11) 65 | 12) 9
Expert Tips for Parents and Teachers
For Parents:
- Keep it positive. If your child gets frustrated, stop and try again tomorrow. Pressure creates maths anxiety.
- Praise the effort, not just the answer. “I love how you thought that through” is more powerful than “Well done, that’s right.”
- Be consistent, not intense. Five minutes daily is your goal — not an hour on weekends.
- Play alongside them. Competing with you (or pretending to struggle) is more engaging than practising alone.
- Connect maths to things they love. Sports scores, video game points, Lego pieces — use their world.
For Teachers:
- Vary the delivery. Some days verbal, some written, some game-based. Different formats strengthen different recall pathways.
- Use spaced repetition. Revisit previous topics regularly rather than moving on completely.
- Target the gaps. Use assessment data to identify which facts each child is weakest on, then target those specifically.
- Make automaticity the goal. The aim isn’t for children to work something out — it’s for them to know it instantly. That’s a different target and needs different practice.
Advanced Insight: Why Automaticity Changes Everything
There’s an important concept in learning psychology called cognitive load — the amount of mental effort your working memory is using at any given moment.
When a child has to work out 6 × 7 mid-problem, they’re using cognitive load that should be going towards understanding the bigger problem. This is why children who haven’t secured their times tables often struggle with fractions, percentages, and algebra later on — it’s not that those topics are beyond them, it’s that their working memory is overloaded.
When mental maths facts become automatic — stored in long-term memory and retrieved without effort — cognitive load drops. The child’s brain is free to focus on the structure of a problem rather than the basic arithmetic inside it.
This is the real reason mental maths matters. It’s not just about speed. It’s about freeing up brainpower for harder thinking.
Think of it like learning to drive. At first, every action takes conscious effort: mirrors, gears, speed, steering. Eventually, those actions become automatic — and you can focus on the road ahead. Mental maths works exactly the same way.
Frequently Asked Questions
What does “Hit the Button” practise? Hit the Button covers number bonds, times tables, division facts, doubling, halving, and square numbers. It’s aligned to KS1 and KS2 expectations in the UK National Curriculum.
At what age should children start learning mental maths? Children begin developing mental maths skills from Year 1 (age 5–6) with simple number bonds and counting strategies. By Year 4 (age 8–9), the expectation is rapid recall of all times tables up to 12 × 12.
How long should my child practise mental maths each day? Short and consistent beats long and occasional. Aim for 5–10 minutes daily. This is enough to build strong recall without causing fatigue or frustration.
Why does my child know their times tables but still make mistakes under pressure? This is very common. It usually means the knowledge is in the brain but not yet automatic — they can retrieve it when calm, but not quickly under pressure. More timed practice (like Hit the Button) will help.
Is it OK to use games for maths practice? Absolutely. Research consistently shows that game-based learning increases engagement, motivation, and retention — especially for younger learners. A game like Hit the Button hit the button maths practice naturally builds speed and accuracy through repeated play.
What’s the difference between mental maths and written maths? Written maths uses columns, grids, or workings on paper. Mental maths happens entirely in your head. Both matter, but mental maths builds speed, confidence, and the kind of number sense that supports all other maths.
My child hates maths. Can mental maths games help? Often, yes. Maths anxiety is usually linked to fear of being wrong or being slow. Games reframe practice as fun challenge rather than test performance. Starting with easier levels and celebrating improvement can rebuild confidence significantly.
Conclusion: Small Daily Practice, Big Results
Mental maths is one of those skills that quietly powers everything else in a child’s education — and in their life.
It’s not about being the fastest in the class or getting every answer right immediately. It’s about building a reliable, flexible relationship with numbers that grows stronger with every bit of practice.
The key takeaways from this article:
- Start with number bonds, then build through times tables and mental strategies
- Keep practice sessions short, consistent, and positive
- Use real-life moments to make maths feel relevant
- Address gaps early — don’t let shaky foundations go unnoticed
- Use games like Hit the Button to build speed and enjoyment at the same time
Whether your child is just starting to explore number bonds in Year 1 or preparing for Year 6 assessments, the strategies in this article will help them grow.
You might also find it helpful to explore related topics like number bonds to 100, square numbers, and division facts — all of which connect directly to mental maths fluency and are available to practise on our interactive game.
Keep going. Even five minutes today is five minutes closer to a child who says “I’m good at maths” — and means it.
