Zerdly Maths

Maths practice that starts the moment you open it. No account, no sign-up, no email. Questions adapt to how you are going, every answer can be explained step by step, and your work stays in your browser.

Ready to use

• 🖨️Worksheet GeneratorMake a printable sheet with an answer key. Pick the topic, level and how many questions.
• 📅Daily Maths ChallengeFive questions, a new set every day, the same for everyone — worked out on your device from the date.
• 🌀Maths MazePick the door with the right answer and walk on. A wrong door loops back — there is no way to fail it.
• 🗺️Maths JourneyThe skills in an order that builds on itself, with a suggested next step. Nothing is locked.
• 🧭Find My LevelNot sure where to start? A few questions per topic and we'll suggest a starting point. Not a test.
• ✖️Times Tables TrainerPick your tables and practise. Adapts as you go, with hints and step-by-step explanations.
• 🔢Multiplication PracticePast the tables: two-digit numbers, partial products and long multiplication, shown as arrays.
• ➕Addition PracticeNumber facts through to carrying and bigger numbers, with base-ten explanations.
• ➖Subtraction PracticeTaking away, two-digit sums and exchanging across columns, explained step by step.
• ➗Division PracticeSharing into equal groups and dividing through the tables. Exact answers, no remainders yet.
• 🍰Fractions PracticeAdding, taking away, multiplying and dividing fractions, with the working shown at every step.
• 📊Charts and AveragesRead real bar charts, then find the total, the range, the middle value and the mean.
• 🎲Chance and CountingBags of counters and fair spinners — how many ways, how many left, how many to expect.
• 📏Measurement and UnitsLength, weight, liquids and time — with the one question that settles every conversion.
• 🔗Number PatternsSpot the rule and run it backwards — counting patterns that grow, much later, into equations.
• ％Percentages PracticeHalf, tenths and quarters first — then anything, including increases, decreases and working backwards.
• 🔷ShapesCount the sides, corners and square corners on a shape that is never the same way up twice.
• 📐AnglesRead a protractor, then work out a missing angle on a line, in a triangle, or round a point.
• 📐Area and PerimeterCount the squares, then work with labelled sides — and finish by finding a side you are not told.
• 🔸Decimals PracticeTenths and hundredths — adding, taking away, multiplying and dividing, with the point kept where it belongs.
• 🕒Telling the TimeRead a real clock face, from o'clock to the exact minute, plus the 24-hour clock.
• 💰Money MathsTotals, change and shopping, in whichever currency you use. Two decimal places, always.
• 🔟Number BondsFind the missing number. Bonds to 10, 20, 100 and beyond — the facts everything else leans on.
• 🧊Volume and CapacityCount the cubes in a stack, then work it out from the edges — and finish by turning a fish tank into litres.
• 📐PythagorasSquare them, add them, square root. Whole-number triangles, drawn every way up so the rule is the rule.
• ⚖️Solving EquationsLetters on both sides, and brackets. An equation is a balance, and the working says so.
• 📐Trigonometry FoundationsOpposite, adjacent, hypotenuse — then sine, cosine and tangent as exact fractions. No calculator.
• 🤝Ratio and ProportionFor every 2 there are 3. Equal ratios, simplest form, and sharing an amount out — with the bar drawn.
• 📈Powers and RootsSquares, cubes and the roots that undo them — plus what that little raised number is actually counting.
• 🧮Order of OperationsWhat do you do first? Times before add, brackets before everything — with sums that punish reading left to right.
• 🔤Algebra BasicsA letter is a number in disguise. Put a number in, then work backwards to find what n must have been.
• ⏳Elapsed TimeHow long between two times, what time it finishes, and what time it started — including the 24-hour clock.
• 📍CoordinatesAlong the corridor, then up the stairs. Read points off a grid, move them, and finish a rectangle.
• ⚖️Equivalent Fractions1/2 and 4/8 are the same amount cut a different way. Fill in the missing number, then cancel down.
• 🥇Compare FractionsWhich is bigger? Including the one that catches everybody — a bigger bottom number means smaller pieces.
• 🔄Fractions, Decimals and Percentages3/4, 0.75 and 75% are one amount written three ways. Swap between them in every direction.
• ❓Missing Number? + 7 = 12. Find the hidden number, with the gap moving around all four operations — algebra, before anyone says so.
• 📉Number LineRead the arrow on a real number line: whole numbers, tenths, below zero and fractions on the same picture.
• 🎯Rounding PracticeTo the nearest 10, 100, 1,000 or tenth — drawn on a line, so you can see which end it is nearer.
• 🔢Place ValueWhat is the 7 worth in 4,732? Digits, columns and what each one is actually worth.
• ⏱️Maths Speed Test30, 60 or 120 seconds of mixed questions. Adjusts as you go, and your best score stays on your device.

Parent or teacher? See how practice is going on this device and print a summary. Reviewing where we place each topic? The age placement review pack has every topic, every age and the questions each age receives.

Skills we cover

Zerdly Maths is organised by skill rather than by year group, so you can work on exactly what you need. Skills marked “ready” have a tool today; the rest are mapped out and on the way.

• Counting on
• Tens and onesready
• Number bondsready
• Additionready
• Subtractionready
• Multiplicationready
• Times tables
• Divisionready
• Recognising fractions
• Moneyready
• Telling the timeready
• Fraction arithmeticready
• Equivalent fractionsready
• Decimalsready
• Area and perimeterready
• Percentagesready
• Number patternsready
• Measurement and unitsready
• Charts and averagesready
• Chance and countingready
• Shapesready
• Anglesready
• Number lineready
• Missing numberready
• Roundingready
• Comparing fractionsready
• Fractions, decimals and percentagesready
• Elapsed timeready
• Coordinatesready
• Algebra basicsready
• Order of operationsready
• Ratio and proportionready
• Powers and rootsready
• Volume and capacityready
• Pythagorasready
• Solving equationsready
• Trigonometry foundationsready

School levels

You can view skills by country to see roughly when they are usually taught: International / not sure, Australia, United States, England, New Zealand, Singapore.

School levels are a guide only. They show where a skill is usually taught in each country and are not taken from, aligned to, or endorsed by any curriculum authority. Your school may cover it earlier or later.

Privacy

No account. No sign-up. Nothing you answer is sent to Zerdly. Progress is saved on your device only if you choose to switch saving on, and you can delete it at any time. Read the full Kids Maths privacy explanation.