|
What do we mean by common
factors?
Numbers that are factors of two numbers.
Can you show me an example?
Yes, it is much easier to see with an example.
What are the common factors of 4 and 6?
Factor pairs of 4 are
1 × 4
2 × 2
So the factors of 4 are 1, 2 and 4
1 2 4
Factor pairs of 6 are
1 × 6
2 × 3
So the factors of 6 are 1, 2, 3 and 6
1 2 3 6
1 2 4
1 2 3 6
The ones that are factors of both 4 and 6 are 1 and 2
How much should I show to make the method clear
AND for me to be able to check my work?
What are the common factors of 4 and 6?
Factor pairs of 4
1 × 4
2 × 2
Factors of 4
1 2 4
Factor pairs of 6
1 × 6
2 × 3
Factors of 6
1 2 3 6
1 2 4
1 2 3 6
Answer ............ 1 and 2
If I feel a bit more confident
could I show a bit less working but still make the method clear?
What are the common factors of 4 and 6?
[4]
1 × 4
2 × 2
1 2 4
[6]
1 × 6
2 × 3
1 2 3 6
Answer ............ 1 and 2
|