A selection of free mathematical resources (calculators, exercises, games, quizzes, course reminders) to learn how to calculate with different types of numbers.

Numbers : Reminder

Prime numbers

A prime number is an integer greater than or equal to 2 that has no divisors other than 1 and itself.

Decomposition in product of primes

Any integer greater than or equal to 2 is prime or product of primes.
When we write an integer as a product of prime numbers, we say that we decompose this integer into a product of prime numbers.

Percentage

A percentage is defined as a proportionality coefficient expressed as a fraction with a denominator of 100.

To calculate p% of a number is to multiply that number by `p/100`.

Euclidean division

Performing Euclidean division of a by b, is equivalent to determining two numbers, the quotient (q) and the remainder (r) such that a = b*q + r .

Numbers : calculators

Numbers : games and quizzes

  • This game allows you to practice the calculation of simple surfaces: square, rectangle, circle. game about area calculations of usual figures. (numbers): This game allows you to practice the calculation of simple surfaces: square, rectangle, circle.
  • This game on time calculations allows to practice manipulating durations expressed in days, hours, minutes, seconds (d, h, min, s). Duration calculation game (numbers): This game on time calculations allows to practice manipulating durations expressed in days, hours, minutes, seconds (d, h, min, s).
  • In this calculation game with integers, kids must find the right answer in a list of values. math game with integers (numbers): In this calculation game with integers, kids must find the right answer in a list of values.
  • This Greatest Common Divisor quiz gives practice in calculating the GCD of two integers. Quiz on the calculation of the GCD (numbers): This Greatest Common Divisor quiz gives practice in calculating the GCD of two integers.
  • To succeed in this game on the calculation of the percentage of a whole number, kids must choose the good answer among a list of proposition. Calculation game percentages (numbers): To succeed in this game on the calculation of the percentage of a whole number, kids must choose the good answer among a list of proposition.
  • The goal of the game is to complete a magic square that has empty areas. magic square game (numbers): The goal of the game is to complete a magic square that has empty areas.
  • This math game allows you to practice converting length and area measurements. Measurement conversion game (numbers): This math game allows you to practice converting length and area measurements.
  • This game allows you to practice making conversions on days, hours, minutes, seconds (d, h, min, s). time conversion game (numbers): This game allows you to practice making conversions on days, hours, minutes, seconds (d, h, min, s).
  • In this fraction game, children must complete an equality involving a fraction by finding the missing denominator in a list. find the denominator game (numbers): In this fraction game, children must complete an equality involving a fraction by finding the missing denominator in a list.
  • Online game of calculation, which allows practicing integer division. division game (numbers): Online game of calculation, which allows practicing integer division.
  • Online calculation game, which allows to train to recognize if a number is divisible by 2, 3, 4, 5, 9, 10, 25, 100. criteria divisibility game (numbers): Online calculation game, which allows to train to recognize if a number is divisible by 2, 3, 4, 5, 9, 10, 25, 100.
  • Online fraction game suitable for anyone looking for a good math game online. fraction game (numbers): Online fraction game suitable for anyone looking for a good math game online.
  • This math game is based on the calculation of whole fractions. To win this quiz, you just have to find the result of an operation between two fractions. Fraction calculation game (numbers): This math game is based on the calculation of whole fractions. To win this quiz, you just have to find the result of an operation between two fractions.
  • The purpose of this integer fraction comparison game is to find the operator (> or <) to place between the fractions being compared. fraction comparison game (numbers): The purpose of this integer fraction comparison game is to find the operator (> or <) to place between the fractions being compared.
  • To pass this quiz on irreducible fractions, you just have to find the irreducible form of an operation between several fractions. irreducible fraction of an expression (numbers): To pass this quiz on irreducible fractions, you just have to find the irreducible form of an operation between several fractions.
  • In this game of transforming a whole fraction into a percentage, children must choose the correct answer from a list of suggestions. Fraction to percentage transformation game (numbers): In this game of transforming a whole fraction into a percentage, children must choose the correct answer from a list of suggestions.
  • The goal of the countdown maths game is to find a target number using arithmetic operations from a list of given numbers. countdown game (numbers): The goal of the countdown maths game is to find a target number using arithmetic operations from a list of given numbers.
  • The goal is to choose from a list the multiplication that allows to calculate a given number online. multiplication game (numbers): The goal is to choose from a list the multiplication that allows to calculate a given number online.
  • The goal of this quiz is to multiply a number by 10, 100, 1000 or 0.1, 0.01, 0.001. To win this game, you just have to find the right result in a list. Game multiplication by 10, 100, 1000 or 0.1, 0.01, 0.001 (numbers): The goal of this quiz is to multiply a number by 10, 100, 1000 or 0.1, 0.01, 0.001. To win this game, you just have to find the right result in a list.
  • The goal of this integer comparison game is to find the operator (less than, greater than or equal to) to place between the numbers being compared. number comparison game (numbers): The goal of this integer comparison game is to find the operator (less than, greater than or equal to) to place between the numbers being compared.
  • Online calculation game: You must find the missing number in a mathematical expression. missing number game (numbers): Online calculation game: You must find the missing number in a mathematical expression.
  • This game allows you to practice calculating perimeters on common shapes: square, rectangle, triangle, circle. perimeter game (numbers): This game allows you to practice calculating perimeters on common shapes: square, rectangle, triangle, circle.
  • The little math quiz collects a set of small fun math exercises to do online for 7-11 year olds. the little math quiz (numbers): The little math quiz collects a set of small fun math exercises to do online for 7-11 year olds.
  • The goal of this proportionality game is to find the value that completes a proportionality table. proportionality game (numbers): The goal of this proportionality game is to find the value that completes a proportionality table.
  • This quiz uses the Pythagorean theorem to calculate the hypotenuse of a right triangle. Quiz on the Pythagorean theorem (numbers): This quiz uses the Pythagorean theorem to calculate the hypotenuse of a right triangle.
  • This online game of mental calculation, allows to revise addition, subtraction, multiplication and division, It helps students in learning arithmetic operations. four operations game (numbers): This online game of mental calculation, allows to revise addition, subtraction, multiplication and division, It helps students in learning arithmetic operations.
  • Online calculation game consisting of finding the missing operator in a mathematical expression. missing operator game (numbers): Online calculation game consisting of finding the missing operator in a mathematical expression.
  • Addition tables game to learn, revise, memorize addition tables from 1 to 20 online. addition tables game (numbers): Addition tables game to learn, revise, memorize addition tables from 1 to 20 online.
  • Times tables game to revise and learn multiplication tables from 1 to 10 online. times tables game (numbers): Times tables game to revise and learn multiplication tables from 1 to 10 online.
  • Online  mental calculation game  to help to memorize the subtraction tables. Subtraction tables game (numbers): Online mental calculation game to help to memorize the subtraction tables.
  • Online mental calculation game, allows to review addition, subtraction and multiplication, this game helps students to practise arithmetic operations. three operations game (numbers): Online mental calculation game, allows to review addition, subtraction and multiplication, this game helps students to practise arithmetic operations.

Numbers : exercises

Algebraic calculation | Equations | Finance | Real functions | Trigonometric functions | Fractions | Geometry | Matrices | Numbers | Complex numbers | Statistics | Numerical sequences | Time | Vectors