Year 9 Prime Factorisation Worksheets | Printable PDFs
Year 9 Prime Factorisation worksheets for Year 9 Maths (Key Stage 3). Students aged 13–14 learn how to express numbers as a product of prime factors using a range of methods. Students must feel comfortable with working with prime numbers. For practice with prime numbers see, Year 8 Prime Numbers Worksheets.
Students practise using prime factor trees, venn diagrams and prime factorisation techniques to solve number problems. Prime factorisation is the process of writing a number as a product of its prime factors. For example, 12 = 2 × 2 × 3.
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Common Questions about Year 9 Prime Factorisation
What is a prime factor?
A prime factor is a factor that is also a prime number.Why are factor trees useful?
Factor trees help break a number down into its prime factors in a clear and organised way.How can prime factorisation be used in Venn diagrams?
Prime factors that are common to two numbers go in the intersection, while unique prime factors go in the outer sections.
Year 9 Prime Factorisation Common Mistakes
Common Mistake 1
Stopping the factor tree before all branches end in prime numbers.Common Mistake 2
Including composite numbers in the final prime factorisation.Common Mistake 3
Placing common prime factors outside the intersection of a Venn diagram.
Prime Factorisation Worksheets - Free Worksheets Above
Prime Factor Trees (A)
Prime Factor Trees (B)
Prime Decomposition Venn Diagrams