Explain how to identify a prime factor of a number

Maths

In this unit pupils will explain reasons for changing 2-factor multiplication calculations to 3-factor multiplications explaining what a factor is and how to use arrays and multiplication/division facts to find them.  They will identify prime numbers and composite numbers. In the future unit pupils will explain how to identify a multiple or common multiple to solve problems in a range of contexts.

In the prior unit pupils explained the use of the commutative and associative laws when multiplying three or more numbers. In this unit pupils will explain reasons for changing 2-factor multiplication calculations to 3-factor multiplications explaining what a factor is and how to use arrays and multiplication/division facts to find them. They will identify prime numbers and composite numbers

Understand and use the concept of factorisation (square and prime numbers)

What are the prime factors shown in this factor bug?

The factor bug shows the factors of 16  Which of the calculations below correctly shows 16 decomposed into prime factors?

The factor bug shows the factors of 30 Which of the calculations below correctly shows 30 decomposed into prime factors?

What is the missing prime factor?  51 = 3 × {{ }}

What square number is represented by this incomplete factor bug?

Match the expression to the correct product.

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