FACTORS
Factors are the numbers you multiply together to get a product. For example, the product 24 has several factors. 24 = 1 x 24 24 = 2 x 12 24 = 3 x 8 24.
Dec 16, 2015
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FACTORS
Factors are the numbers you multiply together to get a product.
For example, the product 24 has several factors.
24 = 1 x 2424 = 2 x 1224 = 3 x 824 = 4 x 6SO, the factors are 1, 2, 3, 4, 6, 8, 12, 24
FINDING FACTORSStart with 1 x the number.Try 2, 3, 4, etc.When you repeat your factors, cross
out the repeat - you’re done at this point.
If you get doubles (such as 4 x 4), then you’re done. Repeats or doubles let you know you’re done.
What are the factors of 16?1 x 16
2 x 8
3 x ?? 3 is not a factor, so cross it out
4 x 4 doubles = done
The factors of 16 are 1,2,4,8,16
What are the factors of 18? 1 x 18
2 x 9
3 x 6
4 x ??5 x ??
6 x 3
Repeat! Cross it out! We’re done!
The factors are 1,2,3,6,9,18
Find all the factors of each number. List them in order from least to
greatest.
25 ______. _______, _______27 _____, ______, _______,_______12 _____, _____, ______, _______, ______,
_______.15 _______, _______, _______ ,_______.3 _______, ________.
How to find Prime Factors?
48
Step 1 – Start with a composite number.
Step 2 – Write down a multiplication that equals this number or any pair of factors of this number.
6 x 8 = 48
How to Do Prime Factorization Using a Factor Tree
Step 3 – Find factors of the numbers (factor ) you
got in step 2.
6 x 8
2 x 3 x 2 x 4
48
Step 4 – Find factors of these numbersuntil all factors are prime numbers.
6 x 8
2 x 3 x 2 x 4
2 x 3 x 2 x 2 x 2
48
Step 6 – Count how many numbers arethe same and write exponents for them.
2 x 2 x 2 x 2 x 3
2 x 3 = 484
WORKING TOGETHER!!!!!!!
Prime factor this number
4
Prime factor this number
42 x 22 = 4
2 = 4
Prime factor this number
6
Prime factor this number
6
2 x 3 = 6
Prime factor this number
22
Prime factor this number
22
2 x 11= 22
Prime factor this number
12
Prime factor this number
12
3 x 4
2 x 3 = 122
= 123 x 2 x 2 = 122 x 2 x 3 = 12
Prime factor this number
21
Prime factor this number
21
3 x 7= 21
Find the prime factors of these numbers
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