Explain how to identify common factors between two or more numbers
I can explain how to identify common factors between two or more numbers.
- Year 5
Explain how to identify common factors between two or more numbers
I can explain how to identify common factors between two or more numbers.
Lesson details
Key learning points
- A common factor is a factor which is shared by two or more numbers
Keywords
Factor - A factor is a whole number which exactly divides another whole number.
Common factor - When we compare lists of factors of two or more numbers, any factors that are the same are common factors.
Prime factor - A prime factor is a factor of a number that is a prime number.
Common misconception
Pupils may only record a prime factor once in the Venn diagram even though it might be used more than once in the composition of the number.
It is important the clarify that we are finding common prime factors that are used in the composition of two numbers, and this might include a prime factor being used more than once.
Licence
Lesson video
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Prior knowledge starter quiz
6 Questions
Q1.Two numbers that multiply each other to form a product are known as:
Q2.Tick the number(s) that represent the factors in this equation 21 = 7 × 3
Q3.Match the factor pairs for the product of 20
Q4.Write down the incorrect factor of 30 from this factor bug.
Q5.Tick the prime factors of 12, using the factor circle to help you.
Q6.Which image of a factor circle represents the number 24 as prime factors?
Assessment exit quiz
6 Questions
Q1.Tick the factors of 15
Q2.Common factors are:
Q3.Tick the common factors of 12 and 15
Q4.Complete the sentence. is a common factor of every number.
Q5.Use the prime factors to find the factors of 36 Tick each correct factor
Q6.Tick the common factors of 8 and 28
