Factors What are factors Factors What are the

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Factors What are factors? ?

Factors What are factors? ?

Factors What are the factors of 10? Can you find a pair of numbers

Factors What are the factors of 10? Can you find a pair of numbers that multiply together to give 10? 5 x 2 = 10 So 5 and 2 are factors of 10. Is there another pair of numbers that multiply together to give 10? 1 x 10 = 10 So 1 and 10 are also factors of 10. Factors of 10 = 1, 10, 2, 5

Factors A pair of numbers that multiply together to give the target number. What

Factors A pair of numbers that multiply together to give the target number. What are the factors of 8 4 x 2=8 1 x 8=8 Factors of 8 = 1, 8, 2, 4

Factors A pair of numbers that multiply together to give the target number. What

Factors A pair of numbers that multiply together to give the target number. What are the factors of 20 2 x 10 = 20 4 x 5 = 20 1 x 20 = 20 Factors of 20 = 1, 20, 2, 10, 4, 5

Factors A pair of numbers that multiply together to give the target number. What

Factors A pair of numbers that multiply together to give the target number. What are the factors of 7 1 x 7=7 Factors of 7 = 1, 7 A number with factors of 1 and itself is called a PRIME NUMBER

Factors Can you think of any other PRIME NUMBERS The First 1000 Primes

Factors Can you think of any other PRIME NUMBERS The First 1000 Primes

Factors Can you find the other half of the pairs that multiply together to

Factors Can you find the other half of the pairs that multiply together to make 36 2 x ? = 36 2 x 18 = 36 ? x 36 = 36 1 x 36 = 36 6 x ? = 36 6 x 6 = 36 3 x ? = 36 3 x 12 = 36 4 x ? = 36 4 x 9 = 36 Factors of 36 = 1, 36, 2, 18, 3, 12, 6, 9, 4 Can you spot the odd pair?

Factors of 36 = 1, 36, 2, 18, 3, 12, 6, 9, 4 The

Factors of 36 = 1, 36, 2, 18, 3, 12, 6, 9, 4 The odd pair was 6 x 6 = 36 This pair has identical numbers. This means that 36 is special and is called a SQUARE NUMBER

Square Numbers Can we find some more Square Numbers? ?

Square Numbers Can we find some more Square Numbers? ?

We can use this idea of factors to help us with Multiplication. 4 x

We can use this idea of factors to help us with Multiplication. 4 x 2 x 3 0 r 3 x 2 x 4 0 r 4 x 3 x 2 Are there any other ways of doing this? Will we get the same answer every time?

We can use this idea of factors to help us with Multiplication. 8 x

We can use this idea of factors to help us with Multiplication. 8 x 4 x 3 4 x 2 x 2 x 2 Which could be x 3 4 x 3 x 2 x 2 x 2 Which is 12 double x 10 2 x 20 4 x 40 2 20 4 2 40 8 2 80 8 16

We can use this idea of factors to help us with Multiplication. 12 x

We can use this idea of factors to help us with Multiplication. 12 x 4 x 3 6 x 2 x 2 x 2 3 x 2 Which could be x 3 x 2 3 x 3 x 2 x 2 Which is 9 double

We can use this idea of factors to help us with Multiplication. 17 x

We can use this idea of factors to help us with Multiplication. 17 x 12 17 17 x 6 x 2 x 3 x 2 = 17 x 3 x 2 = 51 x 2 = 204 X 2 x 10 3 30 7 21

Another way of showing this is to record the factors horizontally. 26 x 6

Another way of showing this is to record the factors horizontally. 26 x 6 = (13 x 2) x (3 x 2) = 13 x 2 x 2 = 39 x 2 x 2 = 78 x 2 = 156 x 10 3 3 30 9 x 9 30 2 60 18 x 8 70 2 140 16

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