Here is the list of online maths exercises on numbers. Each corrected exercise is accompanied by hints, course reminders and methodological advice to help you practise independently.

72 exercises
• N°1110 (Numbers) : Countdown is an arithmetic exercise that allows you to practice quick mental calculation in an efficient way. The goal is to reconstruct an integer using other integers and basic arithmetic operations (+,-,*,/).

Exercise example :

Use yellow numbers and blue arithmetic operators to calculate the target number.

## Countdown

1110 arithmetic_solver
• N°1111 (Numbers) : The purpose of this exercise is to compare two integers, using the appropriate comparison operator.

Exercise example :

Compare the following numbers: 751 ... 956.

1111
• N°1112 (Numbers) : The goal of this corrected exercise is to find the missing sign of an arithmetic expression, course reminders accompany this exercise.

Exercise example :

What is the missing sign in the expression: 15 ... 5=3.

1112
• N°1113 (Numbers) : The purpose of this math activity is to calculate the percentage of an integer.

Exercise example :

What is the result of 10% of 80.

1113
• N°1114 (Numbers) : The objective of this numerical activity is to multiply a decimal number by 10,100,1000 or 0.1,0.01, or 0.001.

Exercise example :

What is the result of the following product: 836.912 * 0.001 ?

• N°1115 (Numbers) : The purpose of this exercise is to find the result of arithmetic operations (+, -, *, /) with integers.

Exercise example :

What is the result of the following operation 473+295 ?

• N°1116 (Numbers) : The purpose of this exercise on Euclidean division of two integers is to find the quotient and remainder.

Exercise example :

Compute the quotient and remainder of the Euclidean division of 621 by 45.

1116 6th Grade euclidean_division
• N°1117 (Numbers) : The purpose of this exercise is to round a decimal number to a given precision.

Exercise example :

Give the rounding to 2 decimal places of : 11.445631.

1117 6th Grade round
• N°1118 (Numbers) : This graphical exercise allows to learn how to locate in the plane, to succeed, you just have to place at the right place a point of given abscissa.

Exercise example :

Point A is on the x-axis, its x-coordinate is 7. Place it correctly.

• N°1119 (Numbers) : The objective of this activity is to complete a "hole" operation, otherwise known as solving a simple equation.

Exercise example :

What is the missing number in the following expression : ...-5 = 4?

1119
• N°1124 (Numbers) : This exercise corrected of calculation makes it possible to practise on line to transform a decimal number into percentage.

Exercise example :

Express 0.97 as a percentage.

1124 percentage
• N°1125 (Numbers) : This corrected math exercise allows you to practice transforming a fraction into a percentage online.

Exercise example :

Express 24/25 as a percentage.

1125 percentage
• N°1129 (Numbers) : This activity on fractions allows to practice simplifying an integer fraction using the GCD.

Exercise example :

Simplify the following fraction 7/14.

1129 6th Grade fraction
• N°1130 (Numbers) : This corrected exercise on fractions aims to complete a fractional expression so that an equality is verified.

Exercise example :

By what value must the following expression 10/4=.../36 be completed for the equality to be verified?

• N°1131 (Numbers) : The purpose of this corrected fraction exercise is to simplify a fractional expression.

Exercise example :

Write in the form of a fraction or a whole number the following expression: 1/4*14.

1131 6th Grade fraction
• N°1132 (Numbers) : The purpose of this exercise is to give an approximate value to one decimal place of an algebraic.

Exercise example :

Give an approximate value to one decimal place of the following expression: 10/17*19

• N°1211 (Numbers) : The goal of this whole number math exercise is to practice multiplying and adding them.

Exercise example :

What is the result of 87*34+7027.

1211 7th Grade calculator
• N°1212 (Numbers) : The objective of this corrected calculus exercise is to add a fraction with a whole number.

Exercise example :

What is the result of 14+1040/80.

1212 7th Grade fraction
• N°1213 (Numbers) : The objective of this corrected math exercise is to simplify a fraction after calculating its denominator.

Exercise example :

What is the result of 3768/(91+66).

1213 7th Grade fraction
• N°1214 (Numbers) : The objective of this math exercise is to simplify a fraction that has a fraction as the denominator.

Exercise example :

What is the result of 96/(32/4).

1214 7th Grade fraction
• N°1215 (Numbers) : The objective of this corrected math exercise is to calculate a written expression in natural language.

Exercise example :

What is the result of 5 plus 4 plus 2.

• N°1217 (Numbers) : This exercise allows you to apply the techniques of simplification of fractions to calculate the product of two fractions.

Exercise example :

What is the result of the following fraction product: (24/2)*(14/3).

1217 7th Grade fraction
• N°1219 (Numbers) : The purpose of this exercise is to compare two fractions, choosing the appropriate comparison operator from the list provided.

Exercise example :

Compare the following fractions 6/4...5/4.

1219 7th Grade compare_fractions
• N°1220 (Numbers) : This corrected exercise aims to practice addition, subtraction or multiplication of 2 fractions.

Exercise example :

Perform the following calculation 3/5*4/6.

1220 7th Grade fraction
• N°1223 (Numbers) : The purpose of this exercise is to calculate an arithmetic expression composed of addition and subtraction, taking into account the priorities of the operations.

Exercise example :

What is the result of (6-4)+(9+6)+(3-10).

1223 7th Grade calculator
• N°1225 (Numbers) : The purpose of this corrected math exercise is to find the denominator of a fraction from an equality.

Exercise example :

What is the missing number in the following expression 27/?=3.

• N°1226 (Numbers) : The purpose of this exercise is to verify an equality, the goal being to learn about equation solving.

Exercise example :

Is the following equality 4+x-5 = 2 true for x = 2?

• N°1236 (Numbers) : The purpose of this number math exercise is to practice adding relative numbers.

Exercise example :

What is the result of 8+(-10)?

1236 7th Grade evaluate
• N°1237 (Numbers) : The purpose of this corrected math exercise is to complete an equality that involves relative numbers.

Exercise example :

What is the missing number in the following expression: 2+...=-4.

• N°1238 (Numbers) : The purpose of this math exercise is to string together a series of additions and subtractions of relative numbers.

Exercise example :

What is the result of 10+6+4-6-7-5.

1238 7th Grade evaluate
• N°1241 (Numbers) : The purpose of this exercise is to learn about solving equations using magic squares.

Exercise example :

In a magic square, the sum of the numbers in each row, in each column and on each diagonal is the same.
Complete the following magic square:

1241
• N°1311 (Numbers) : The objective of this algebraic calculus exercise is to expand an algebraic expression.

Exercise example :

Expand the following expression -10*(-12).

1311 8th Grade evaluate
• N°1312 (Numbers) : The objective of this exercise is to put the product of a number by the inverse of another number in fraction form.

Exercise example :

Put in the form a*1/b the following fraction 19/6

• N°1313 (Numbers) : This exercise allows to practice calculations with decimals, the goal is to give the approximate value of a fraction to one decimal place.

Exercise example :

Give a value approximating to 0.1 of the following fraction 19/6.

• N°1314 (Numbers) : The objective of this activity is to simplify a fraction whose numerator and denominator are composed of products of whole numbers.

Exercise example :

Simplify the following fraction (3*3)/(8*3).

1314 8th Grade fraction
• N°1315 (Numbers) : This exercise allows to learn how to simplify a fraction whose numerator and denominator are composed of product of relative numbers.

Exercise example :

Put in the form of an irreducible fraction: -5*8/(9*6).

1315 8th Grade fraction
• N°1316 (Numbers) : The objective of this exercise is to simplify a fraction whose numerator and denominator are fractions, in other words, a fraction of fractions.

Exercise example :

Put in the form of an irreducible fraction: ((2)/(-4))/((6)/(9)).

1316 8th Grade fraction
• N°1317 (Numbers) : The objective of this numerical computation exercise is to write in the form of a power of 10 a product of numbers.

Exercise example :

Write the following product as a power of 10: 10^(-10)*10^(-3).

• N°1318 (Numbers) : The purpose of this exercise is to practice finding the writing in the form of a power of 10, of a number raised to a power.

Exercise example :

Write the following product as a power of 10: (10^(-6))^(-9).

• N°1319 (Numbers) : The purpose of this corrected math exercise is to write a number with scientific notation.

Exercise example :

Write using scientific notation the following number: -0.7539046.

• N°1321 (Numbers) : This exercise allows to practice putting a product of numbers in the form of a power.

Exercise example :

Write in the form of a single power the following expression: 20^(-3)*20^(6).

• N°1322 (Numbers) : The purpose of this math exercise is to complete an equality that involves powers.

Exercise example :

With what value must the question mark be replaced for the following equality to be true? 94^(-3)*94^(?)=94^(-8)

• N°1324 (Numbers) : The objective of this exercise is to give an approximate value of a square root to one decimal place.

Exercise example :

Give a value approximated to 10^-1 of sqrt(91).

1324 8th Grade sqrt
• N°1328 (Numbers) : The objective of this solved exercise is to compare two fractions using the correct operator.

Exercise example :

Compare the following two expressions 90/10 ... 27/10.

1328 8th Grade compare_fractions
• N°1329 (Numbers) : The objective of this math exercise is to frame a fraction using two decimal numbers.

Exercise example :

Give a frame to the nearest 10^-1 of the following fraction 25/4.

• N°1330 (Numbers) : The objective of this math exercise is to equate a simple problem to solve it.

Exercise example :

I have a number, I add 27 to it, I subtract 22 from the result and I get 43, what is this number?

1330 8th Grade equation_solver
• N°1331 (Numbers) : The purpose of this exercise on proportionality is to check that a table is indeed a proportionality table.

Exercise example :

Does the following table correspond to a proportionality table?

643
604132

1331
• N°1332 (Numbers) : The purpose of this corrected calculus exercise is to find the coefficient of a proportionality table.

Exercise example :

What is the coefficient of proportionality that allows us to go from the first to the second line of the following table?

971
54426

1332
• N°1333 (Numbers) : The purpose of this exercise is to find the missing value of a proportionality table.

Exercise example :

By what value must we replace the ? so that the following table is a proportionality table?

7348
28?1632

1333
• N°1334 (Numbers) : The purpose of this exercise is to complete using the cross product, a simple table so that it is a proportionality table.

Exercise example :

What is the missing value in the following proportionality table?

x80
294560

1334
• N°1335 (Numbers) : The goal of this math exercise is to solve a first degree inequation with one unknown.

Exercise example :

We suppose that 3*x-2<5. Choose the expression that is true from the list below.

1335 8th Grade inequality_solver
• N°1427 (Numbers) : The objective of this corrected arithmetic exercise is to calculate the gcd of two integers.

Exercise example :

Calculate the gcd of 225 and 84.

1427 9th Grade gcd
• N°1428 (Numbers) : The objective of this exercise is to use the GCD to check if two integers are prime to each other.

Exercise example :

Are the following numbers 205 and 318 prime to each other ?

1428 9th Grade gcd
• N°1429 (Numbers) : The purpose of this exercise is to put a fraction into its irreducible form.

Exercise example :

Put the following fraction in its irreducible form: 144/210.

1429 9th Grade fraction
• N°1434 (Numbers) : The objective of this corrected calculus exercise is to simplify an expression containing fractions.

Exercise example :

Write D as an irreducible fraction: D = ((9/6+5/7)*2)/8

1434 9th Grade fraction
• N°1435 (Numbers) : The purpose of this corrected math exercise is to calculate the value of a function for a given number.

Exercise example :

Let f be the application of R in R defined by f(x)=2*(3*x+1)^2-6*(2*x+3)^2 :
Compute f(2).

1435 9th Grade array_values
• N°1436 (Numbers) : The objective of this exercise is to reduce a fraction, simplify a square root, and calculate a fraction that contains powers.

Exercise example :

Let A=3/8+10/6-8/4 , B=-8*sqrt(24)-4*sqrt(216)-5*sqrt(54)-1*sqrt(54) and C=(18*10^5*3*10^6)/(6*10^11)
1. Compute A and give the result as an irreducible fraction.
2. Write B in the form a*(sqrt(6)) where a is a relative integer.
3. Write C as an integer.

1436 9th Grade fraction
• N°1437 (Numbers) : The objective of this exercise is to calculate the gcd of two numbers and simplify a fraction.

Exercise example :

1. Compute the GCD of the numbers 5104 and 968.
2. Write the fraction 5104/968 in irreducible form.

1437 9th Grade fraction
• N°1511 (Numbers) : This corrected exercise consists simply in calculating the absolute value of a numerical expression.

Exercise example :

Calculate the absolute value of C=8+9.

1511 10th Grade abs
• N°1512 (Numbers) : This corrected exercise consists simply in calculating the absolute value of an algebraic expression composed of fractions.

Exercise example :

Calculate the absolute value of F=2/3-3/7.

1512 10th Grade abs
• N°1515 (Numbers) : The purpose of this corrected exercise is to complete the decomposition of a number into prime numbers.

Exercise example :

Indicate by which number the "question mark" must be replaced in the prime decomposition of 60 so that the following equality is verified.
60 = 3*5*?*?

1515 10th Grade prime_factorization
• N°1516 (Numbers) : The purpose of this exercise is to find the ordered decomposition of a number into primes.

Exercise example :

Give the decomposition of 854 into a product of prime numbers by ordering the factors and using the power operator ^ if necessary.

1516 10th Grade prime_factorization
• N°1517 (Numbers) : The purpose of this corrected arithmetic exercise is to determine if a number is a prime number.

Exercise example :

51 is an integer, is it prime ?

1517 10th Grade prime_factorization
• N°1518 (Numbers) : The goal of this exercise is to find the ordered decomposition of a product of numbers into primes.

Exercise example :

Give the product decomposition of the following expression 30*16 by ordering the factors and using the power operator ^ if necessary.

1518 10th Grade prime_factorization
• N°1520 (Numbers) : The purpose of this exercise is to simplify a fraction using the decomposition of a number into a product of prime factors.

Exercise example :

Write in the form of an irreducible fraction the following fraction (40*28)/(35*24) using the decomposition into prime factors.

1520 10th Grade fraction
• N°1539 (Numbers) : The purpose of this exercise is to use algebraic computation techniques to determine the irreducible form of a division of fractions.

Exercise example :

Put into irreducible fraction form: ((-9)/(20))/((-36)/(-15)).

1539 10th Grade fraction
• N°1541 (Numbers) : The purpose of this corrected calculus exercise is to use algebraic calculus techniques to simplify a product of fractions.

Exercise example :

Put into irreducible fraction form: ((-9)/(20))/((-36)/(-15)).

1541 10th Grade fraction
• N°11171 (Numbers) : This exercise allows you to practice rounding a decimal number to the nearest whole number.

Exercise example :

Rounding to the nearest whole number 71.710931

11171 6th Grade round
• N°11172 (Numbers) : To pass this problem on rounding, you just have to round correctly a decimal number to one digit after the decimal point.

Exercise example :

Rounding to one digit after the decimal point 72.597345.

11172 6th Grade round
• N°11211 (Numbers) : This graphical reading activity consists in reading correctly the coordinates of a point placed in a reference frame.

Exercise example :

What are the coordinates of the following point ?

11211
• N°11212 (Numbers) : To do this exercise of location in the plane, you must place a point in a reference frame from its abscissa and its ordinate.

Exercise example :

The point A has coordinates (7;0). Place it correctly.

11212
• N°14110 (Numbers) : The purpose of this corrected math exercise is to simplify a square root.

Exercise example :

Write in the form sqrt(a)/b, the following expression 1/sqrt(360), where a and b represent two integers.

14110 9th Grade simplify_surd

The Numbers topic is available for : 6th Grade, 7th Grade, 8th Grade, 9th Grade, 10th Grade

List of exercises by class : middle and high schools, 6th Grade, 7th Grade, 8th Grade, 9th Grade, 10th Grade, 11th Grade, 12th Grade.