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GCF 1
GCF2
Write the sum of the #'s as the product of their GCF and another sum.
List the Factors
Vocabulary
100
Greatest Common Factor of 6 and 18
What is 6
100
Greatest Common factor of 20 and 50
What is 10
100

30+54

6(5+9)

100

Factors of 12

1,2,3,4,6,12

100
a number whose only two factors are 1 and itself.
Prime Number
200
Greatest Common Factor of 2 and 24
What is 2
200
Greatest Common Factor of 24 and 88
What is 8
200

56+64

8(7+8)

200

Factors of 15

1,3,5,15

200
A number with more than two factors
What is Composite
300
GCF of 5 and 15
What is 5
300
the greatest common factor of 12 and 48
What is 12
300

48+14

2(24+7)

300

Factors of 20

1,2,4,5,10,20

300
numbers multiplied together to get a product
What is a factor
400
GCF of 12 and 20
What is 4
400
Greatest common factor of 30 and 90?
What is 30
400

40+25

5(8+5)

400

Factors of 30

1,2,3,5,6,10,15,30

400
A number (or numbers) that can be divided into two or more numbers with no remainder.

common factor(s)

500
GCF of 7 and 21
What is 7
500
Greatest common factor of 75 and 100
What is 25
500

63+15

3(21+5)

500

Factors of 55

1,5,11,55

500

is the largest of the common factors of two or more numbers

What is greatest common factor or GCF