Factors, GCF, and Simplifying fractions
Use a factor tree to find the prime factors of 12.
2 x 2 x 3
Use a factor tree to find the prime factors of 18.
2 x 3 x 3
Is 9 a prime or a composite number?
9 is a composite number
Use a factor tree to find the prime factors of 20.
2 x 2 x 5
Use a factor tree to find the prime factors of 16.
2 x 2 x 2 x 2
Use a factor tree to find the prime factors of 21.
3 x 7
What are the common factors of 6 and 9?
1 and 3
Look at the factors below:
Factors of 8 → 1, 2, 4, 8
Factors of 12 → 1, 2, 3, 4, 6, 12
Which are common factors of 8 and 12?
1, 2, 4
What are the common factors of 9 and 27?
1, 3, 9
What are the common factors of 10 and 15?
1, 5
What are the common factors of 14 and 21?
1, 7
What are the common factors of 16 and 24?
1, 2, 4, 8
What is the GCF of 8 and 12?
4
What is the GCF of 10 and 35?
5
What is the GCF of 18 and 27?
9
What is the greatest number shared both by 14 and 21?
7
What is the GCF of 12 and 21?
3
Using a factor tree, identify the GCF of 6 and 21.
3
Reduce the fraction 4/12 to its simplest form using the GCF.
1/3
Divide the numerator and denominator of 8/18 by their GCF. What fraction do you get?
4/9
What is the simplest form of 9/15?
3/5
John simplified 12/18 to 2/3.
Is his answer correct or incorrect?
correct
Which fraction is the simplest form of 16/28?
4/7
Find the simplest form of 6/24 using GCF.
1/4
Liam has 8 apples and 12 oranges. He wants to make equal fruit bags with no leftovers.
What is the greatest number of bags he can make?
4 BAGS
A teacher prepared 12 pencils and 24 erasers for her class kits.
The fraction of pencils compared to erasers is 12/24.
Simplify the fraction using the Greatest Common Factor (GCF).
1/2
A class has 16 boys and 24 girls.
The fraction of boys to girls is 16/24.
Simplify the fraction using the GCF.
2/3
At a party, there are 12 red balloons and 27 blue balloons.
The fraction of red balloons to blue balloons is 12/27.
Simplify the fraction using the GCF.
4/9
Maria baked 10 cookies and 25 cupcakes for a party.
The fraction of cookies compared to cupcakes is 10/25.
Simplify the fraction using the Greatest Common Factor (GCF).
2/5
In the school garden, there are 8 sunflower plants and 28 rose plants.
The fraction of sunflowers to roses is 8/28.
Simplify the fraction using the Greatest Common Factor (GCF).
2/7