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GROWING A FACTOR TREE. 18. 10. Or You might notice that 180 has a ZERO in its ONES PLACE which means it is a multiple of 10. SO… 10 x  = 180 10 x 18 = 180. Or You might notice that 180 has a ZERO in its ONES PLACE which means it is a multiple of 10. SO… 10 x  = 180. 180.

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GROWING A

FACTOR TREE


18

10

OrYou might notice that 180 has a ZERO in its ONES PLACE which means it is a multiple of 10.

SO…10 x  = 180

10 x 18 = 180

OrYou might notice that 180 has a ZERO in its ONES PLACE which means it is a multiple of 10.

SO…10 x  = 180

180

You might see that 180 is an EVEN NUMBER and that means that 2 is a factor…

2 x  = 180 ?

Can you think of one FACTOR PAIR for 180 ?

This should be two numbers that multiply together to give the Product 180.

Can we grow a tree of the factors of 180?


18

10

180

NOW

You have to find FACTOR PAIRSfor 10and18

We “grow” this “tree” downwards since that is how we write in English (and we are not sure how big it will be. We could run out of paper if we grew upwards).


2

5

6

3

180

Find factors for 10 & 18

18

10

2 x 5 = 10

6 x 3 = 18


180

18

10

2

5

6

3

3

2

5

2

3

Since 2 and 3 and 5 are PRIME NUMBERS they do not grow “new branches”. They just grow down alone.

Since 6 is NOT a prime number - it is a COMPOSITE NUMBER - it still has factors. Since it is an EVEN NUMBER we see that:

6 = 2 x 

ARE

WE

DONE

???




MA.5.A.6.1Identify and relate prime and composite numbers, factors and multiples within the context of fractions.


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