Math & Logic Games

Free online math games for kids: addition and subtraction, times tables, fractions, angles, coordinates, line graphs, logic puzzles and memory games. They run right in your browser – no download and no sign-up.

• Logic games
• Memory
• Arithmetic
• Fractions
• Geometry and coordinates
• Graphs
• Physics and chemistry

Logic Puzzles with Cali20 puzzles – from a traffic jam and leaky pipes to cube nets and Einstein’s riddle. Each one starts easy and gets harder level by level.Play the puzzles →

Logic games

• ChessPlay chess against the computer and solve chess puzzles.
• Matchstick LogicMove matchsticks to fix the wrong equation.
• SudokuFill the grid with the digits 1 to 9. Four levels, from easy to expert.
• Slide & Solve PuzzlePut the numbers in order by sliding the tiles, from 3×3 to 8×8.
• Cali Balances the SeesawNew: put bricks, people and mystery objects on a seesaw and find out when it balances. 4 levels on the lever rule.
• Tic-Tac-Toe3×3, 5×5 and 7×7 – against the computer or a friend.

Memory

• Flags Memory GameFind the pairs of matching flags and learn the flags of the world.
• Numbers Memory GameOpen the cells and find the pairs of equal numbers.

Arithmetic

• Math Challenge15 problems against the clock: addition and subtraction within 10, 20 or 100, multiplication and division facts up to 12. See right away if you are right.
• Math CrosswordWork out the sums to fill in the crossword: up to 20, up to 100 or with all four operations.
• Adding and Subtracting within 100Right or wrong? Decide fast whether each sum or difference is correct.
• Sushi AdditionFeed the hungry man: pick 2 pieces of sushi that add up to his number.
• Adding, Subtracting, Multiplying and DividingPut the numbers and signs in order to make a true equation. For grades 1–3.
• Cali’s Times TableNew: fill in a whole times table, cell by cell. Three games – multiply, find the factors and divide – with tables up to 5, 10 and 12.
• Number Lines: Magic FiguresNew: 34 levels of magic triangles, squares, wheels and stars, with live line sums, hints, negative numbers and multiplication.
• Number LinesPlace the numbers so that every line adds up to the number at the top. Two phases.

Fractions

• Cali Matches FractionsNew: find the pairs of equal fractions, mixed numbers and pictures with a balance scale. Two modes with 8 levels each.
• Fraction FlagsPaint as many squares as the fraction on each colour shows and make the flag.

Geometry and coordinates

• Cali’s Coordinate AdventureNew: find points and read their coordinates in 5 stages, up to halves and mirror images. Plus path missions and a 60-second blitz.
• Cali and the Coordinate SystemGuide Cali the cat to the point where the food is hidden, in all four quadrants.
• Cali and the Coordinate GridThe same game with positive coordinates only – a good place to start.
• Cali Draws CoordinatesJoin points by their coordinates and draw pictures. 11 levels.
• Bunny’s Angle AdventureNew: five stages from angle types to a full turn, the protractor with both scales, hidden carrots, measure it, a 60-second dash and a daily challenge.
• Bunny and AnglesTurn the bunny to the given angle. The closer you get, the more carrots!
• Online ProtractorMeasure angles as you would on paper: 12 angles in 3 levels.
• Polar CoordinatesA radar game: read where the ship is or place it at a given point, in degrees or in radians.
• Cali Builds AreasNew: build shapes from squares and watch their area and perimeter change. 6 levels, from “build an area” to triangles and trapezoids.

Graphs

• Line Graphs GameFind y = mx + b from the graph, or draw the line from its equation. 10 rounds with hints.
• Graphing LinesExplore slope, y = mx + b and point-slope form, then play the line game.
• Line SlopeFour levels: place a point, find the slope, graph the line and write its equation.
• Function Graph PlotterType a function and see its graph: polar and parametric curves, inequalities, sliders, roots and intersections.

Physics and chemistry

• Cali’s CannonProjectile motion: set the angle and the speed of the cannon and solve 12 challenges. Hit the target, clear the wall, fire on the Moon and beat air resistance.
• Cali’s Circuit LabBuild circuits with batteries, bulbs, switches and resistors, measure current and voltage, and solve 12 challenges.
• Cali Builds AtomsBuild atoms and ions from protons, neutrons and electrons. Free building and 4 levels.
• Cali Balances EquationsSet the coefficients until both sides have the same atoms. Practice and 3 levels.