# Number topics for 8th grade

Free Math Games has the following sub-categories and topics for 8th grade Number. You can study any of the topics with our 3 tutorial activities by following the 'Lessons' link. If you are familiar with the subject, try some of our 10 free games to practice the topic by following the 'Games' links, or test yourself with our multiple choice and written tests using the 'Tests' link.

#### Number   →   Multiples Factors Primes   →   Factors

HCF using product notation

Identify the Highest Common Factor (HCF) using product notation

#### Number   →   Multiples Factors Primes   →   Primes

Prime factors

Identify the prime factors of each given number using product notation

#### Number   →   Fractions   →   Subtract fractions

Subtract fractions: mixed

Subtract mixed fractions by subtracting the whole numbers and the fraction parts separately

#### Number   →   Percentages   →   Using percentages

Percentage change

Compare two quantities to work out the percentage increase or decrease