Maths with Martin
Maths with Martin
School maths, playful: levels by year, 30 lessons per level, games and a worksheet. All free.
Each lesson has worked examples with steps. Practice lives on its own Practice page: you see every question at once, like on paper. Start with ten and when it goes well, add 20, 50, 100 or 200. Write the answer — green = right, red = not yet, and next to it you see why. Nothing is sent to a server.
Which year are you in?
Tap your year. You will see where you belong in the course and what you will practise.
Years 1–2 Number kid numbers to 100additionsubtractionclocksmoneyshapes Start here Years 3–4 Times-table kid times tablesdivisionwritten methodsroundingunitsperimeter Start here Years 5–6 Fraction kid decimalsfractionsdivisibilityanglesareavolume Start here Year 7 Percent kid percentagesratioproportionrule of threetriangles Start here Year 8 Equation kid powersPythagorasexpressionsequationscirclescylinders Start here Year 9 Problem solver simultaneousfunctionssimilaritysolidsmoney mathsentrance tests Start here
Not sure where to start? Prep teaches you how to practise smart. Then jump to your year. Going a level down is not shame — it is training. Your path
Click a level, or track where you are. Levels 1–2 are free.
Cheat sheet
- Estimate first, then calculate. If the result does not match the estimate, look for the mistake.
- Times and divide come before plus and minus. Brackets beat everything.
- A fraction is division: 3/4 = 3 ÷ 4. A percent is a hundredth: 15% of 200 = 200 ÷ 100 × 15.
- When you do not know, draw it: a number line, piles, a rectangle, a triangle.
- Read a word problem twice. Underline the numbers and the question, then calculate.
- Check: put the result back in. An equation with no check is half the work.
- Convert units through one: 1 m = 100 cm, 1 kg = 1000 g, 1 h = 60 min.
- 10 minutes a day beats 2 hours once a month.
Glossary
- Sum, difference, product, quotient — the results of +, −, ×, ÷.
- Fraction — a part of a whole. Top is the numerator (how many parts), bottom is the denominator (how many parts it is split into).
- Percent — a hundredth of the whole. 100% is the whole, 50% is a half.
- Perimeter — the path around a shape. Area — how much fits inside a surface. Volume — how much fits inside a solid.
- Equation — scales in balance. What you do to one side, you do to the other.
- Mean — add everything and divide by how many. Median — the middle value of a sorted list.
- Prime — a number divisible only by one and itself.
- Pythagoras — in a right triangle a² + b² = c².
Looking for coding? Code with Martin has not changed.