Prime factorisation with multiplication and division
Use multiplication and division with primes and prime factorisation to defeat the alien invasions.
Use multiplication and division with primes and prime factorisation to defeat the alien invasions.
Curriculum-aligned activities
Refine and use efficient written methods to divide HTU by U. Use efficient written methods to divide integers and decimals by a one-digit integer.
Find factors and multiples of a number including listing factors in pairs to find all the factors of large numbers. Find common multiples and lowest/least common multiples without the use of the Product of Prime Factors, simple cases only. Find common factors and highest common factor (HCF), including using the term divisor and use given results as an aid.
Understand the definition of a prime number as an integer with exactly 2 factors and be able to test for a number being prime. Know that 2 is the first prime number and the only even prime number.
Find the prime factors of two-digit numbers.
Know the terms product of prime factors and prime factor decomposition. Use a factor tree or similar method to decompose numbers including writing the answer in index form.
Recognise and calculate the square number sequence up to 144 and also include simple higher values, e.g. 400, 10000. Understand the square roots as the reverse process of squaring. Only consider positive square roots.
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