Maths unit A:HCF and LCM

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  • Created by: rvsn
  • Created on: 16-11-14 17:14
Write 12 and 18 as product of prime factors
12=2x2x3, 18=2x3x3
1 of 5
What technique is the first step before you wok out the HCF or LCM
create a venn diagram and fill it in with the prime numbers of both numbers
2 of 5
How do you work out the HCF?
multiply all the common prime numbers
3 of 5
How do you work out the LCM?
Multiply all the numbers left together in the diagram after the common ones have been put in the middle
4 of 5
Work out the HCF and LCM of 12 and 18
HCF=6, LCM=36
5 of 5

Other cards in this set

Card 2

Front

What technique is the first step before you wok out the HCF or LCM

Back

create a venn diagram and fill it in with the prime numbers of both numbers

Card 3

Front

How do you work out the HCF?

Back

Preview of the front of card 3

Card 4

Front

How do you work out the LCM?

Back

Preview of the front of card 4

Card 5

Front

Work out the HCF and LCM of 12 and 18

Back

Preview of the front of card 5

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