Fraction Addition & Subtraction
Practice fraction addition and subtraction with a free, browser-based math game. Includes step-by-step strategy, common mistakes, and classroom tips.
MathRatio Practice
A ratio keeps both parts visible, and that changes how you work with it. Below: simplifying, missing terms, and the mistake almost everyone makes.
Choose your difficulty
Pick a level to start playing. You can switch at any time.
How to play
Simplify the ratio, or work out the missing term, then tap the correct answer.
Tip: your progress and best score are saved in this browser only.
Related games
Multiplication Trainer
Build multiplication fluency with a free, timed browser game. Learn the grid method, spot-friendly factors, and beat your best streak.
MathDecimal Drill
Practice adding and subtracting decimals with a free, browser-based game. Align the decimal point, keep your place value, and raise your score.
MathPercent Practice
Master percentages with a free, browser-based game. Find the part, the whole, or the rate, and learn the 10% shortcut that speeds everything up.
MathArea & Perimeter
Find area and perimeter of rectangles, squares, triangles, and circles in a free, timed browser game. Learn the formulas that never change.
MathDivision Practice
Practice division with a free, timed browser game. Exact answers only, three difficulty levels, and the checks that make division facts stick.
MathMean, Median & Mode
Practice averages in a free, timed browser game. Learn when to use the mean, the median, or the mode, and why the three rarely agree.
MathRounding Numbers
Round to the nearest 10, 100, or whole number in a free, timed browser game. Includes the staged-rounding trap to avoid.
MathGCF & LCM
Find the greatest common factor and least common multiple in a free, timed browser game. Includes the size test that rules out most wrong answers.
MathNegative Numbers
Practice integer addition and subtraction with negatives in a free, timed browser game. Includes the sign rules stated plainly.
MathPowers & Square Roots
Practice exponents and square roots in a free, timed browser game. Every root is exact, and the perfect-square table is the whole shortcut.
MathMetric Conversion
Convert metric units in a free, timed browser game. Every step is a power of ten, so it is really just moving the decimal point.
MathAngles & Missing Degrees
Find the missing angle in a free, timed browser game. Complementary, supplementary and triangle angles, with the shortcuts that beat the countdown.
MathClock & Time Math
Add minutes, measure elapsed time and cross midnight in a free, timed browser game. Real clock arithmetic, not decimal arithmetic.
MathFractions to Decimals
Convert fractions to decimals in a free, timed browser game. Denominators that always terminate, so every answer is exact.
MathMoney & Change
Work out change and add prices in a free, timed browser game. Two-decimal arithmetic, exactly the way it is used at a counter.
MathPercent Change
Work out percentage increases and decreases in a free, timed browser game. The difference is always divided by the original value.
MathOrder of Operations
Solve two-operator expressions in a free, timed browser game. Multiplication before addition, every single time.
MathVolume of Boxes
Find the volume of cubes and boxes in a free, timed browser game. Three dimensions, one multiplication chain, and the missing-side variant.
MathFraction of a Number
Work out a fraction of a whole number in a free, timed browser game. Divide by the denominator first, then multiply — or the other way round.
MathEstimating Sums
Round to the nearest ten and estimate in a free, timed browser game. The skill you use at a till, not in an exam.
MathExpanded Form
Turn a number written in place-value parts back into digits, in a free timed browser game. 3,000 + 400 + 70 + 5 is 3,475.
MathRemainders
Find the remainder after division in a free, timed browser game. The number left over can never reach the divisor.
MathCompare Fractions
Decide which of two fractions is larger in a free, timed browser game. Cross-multiply instead of converting.
MathType the Answer
Type the answer instead of choosing it, in a free timed browser game. No options to guess between — just the arithmetic.
MathWhat you are actually practicing
A ratio compares two quantities by division, and unlike a fraction it keeps both sides visible: 3:2 means three parts of something for every two parts of something else. This game trains the two operations that matter. The first is simplifying — dividing both sides by their greatest common factor, exactly as you would reduce a fraction. The second is finding a missing term — using the scale factor between one side of the ratio and the other.
Ratios show up whenever something is shared, mixed, or scaled: a recipe, a map, a screen aspect, a concrete mix. Being able to move between 12:8 and 3:2 without thinking is the difference between struggling with proportion questions and dispatching them.
How the game works
One problem at a time, four choices, a countdown. A correct answer scores points and moves on; a wrong answer reveals the correct one. Your score and best score stay in this browser only.
Easy asks you to simplify. Medium and hard mix in missing-term problems, where you are given 2:3 = 8:? and must supply the fourth number. Pick a level on the start screen and switch at any time.
Strategies that actually move your score
For simplifying, hunt the greatest common factor. Divide both sides by the largest number that goes into both. If both sides are even, start with 2 and repeat — halving twice is often faster than spotting the factor in one go.
For a missing term, find the scale factor first. In 2:3 = 8:?, the left side went from 2 to 8, so everything multiplied by 4. The right side must also multiply by 4, giving 12. Do not cross-multiply until you have checked whether the scale factor is a whole number — it always is here.
Sanity-check the direction. If the first side grew, the second side must grow too. An answer that moves the opposite way has the ratio upside down.
Common mistakes, and the fix for each
Mistake: simplifying only one side. 12:8 becoming 6:8 or 12:4 is the single most common error. The fix is to say out loud that whatever you divide one side by, you divide the other by too.
Mistake: stopping early. 12:8 reduces to 6:4, which still reduces to 3:2. The fix is to check once more whether the two sides share any factor after your first division.
Mistake: confusing the two sides. 3:2 and 2:3 are different ratios. The fix is to read which quantity was mentioned first in the problem.
A short, honest FAQ
Do I need to install anything? No. It runs in any modern browser.
Is a ratio the same as a fraction? Closely related, and the simplification is identical, but a ratio keeps both parts rather than collapsing them into one value.
What age is it for? Roughly grades 5 through 9, or any adult refreshing proportion work.