Calculating integers from their prime factor expressions
I can evaluate a number written as a product of its prime factors.
Calculating integers from their prime factor expressions
I can evaluate a number written as a product of its prime factors.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- Evaluating a product of primes will give a unique positive integer.
- It is useful to compare numbers using their prime factor product without evaluating the numbers.
- Square numbers can be identified from their product of primes.
- Common factors can be found by comparing the products of their primes.
Keywords
Composite number - A composite number is an integer with more than two factors.
Product - A product is the result of two or more numbers multiplied together.
Prime factors - Prime factors are factors of a number that are, themselves, prime.
Exponent - An exponent is a number positioned above and to the right of a base value. It indicates repeated multiplication.
Common misconception
Identifying if integer is a multiple when its given in its prime factor form.
Only the bases need to be considered, not the exponents. e.g if it is a multiple of 3 it must be a multiple of 3^2, 3^3, etc.
To help you plan your year 7 maths lesson on: Calculating integers from their prime factor expressions, download all teaching resources for free and adapt to suit your pupils' needs...
To help you plan your year 7 maths lesson on: Calculating integers from their prime factor expressions, download all teaching resources for free and adapt to suit your pupils' needs.
The starter quiz will activate and check your pupils' prior knowledge, with versions available both with and without answers in PDF format.
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The assessment exit quiz will test your pupils' understanding of the key learning points.
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Explore more key stage 3 maths lessons from the Properties of number: factors, multiples, squares and cubes unit, dive into the full secondary maths curriculum, or learn more about lesson planning.
Licence
Starter quiz
6 Questions
