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Prime Factorization
Greatest Common Factor
Equivalent Fractions
Simplifying Fractions
Word Problems
100
Is 42 divisible by 2?
Yes, because it is even
100
What does GCF stand for and mean?
GCF stands for Greatest Common Factor and means the largest factor that two or more numbers have in common.
100
Write one equivalent fraction to 1/3.
Possible answers. 2/6, 3/9, 10/30
100
What do you do to simplify fractions?
Find and divide by the GCF
100
Alaska and Hawaii are not part of the 48 contiguous states in the United States. What fraction of the 50 states are not part of the 48 contiguous states? SIMPLIFY!
1/25
200
Test for divisibility. 456
Divisible by 2, 3 and 6
200
How can you use a factor tree to find the GCF?
You can draw a factor tree for the numbers, then find all of the "marriages", then multiply ONE of each of the marriages together to find the GCF.
200
Simplify 16/24
2/3
200
Do you HAVE to use the GCF to simplify fractions? Why or why not?
It is easier, but you could just find a common factor, and then keep dividing it by a common factor, until 1 is the only factor they have in common.
200
In a survey of 16 middle school students, 12 said that comedy was their favorite type of movie. Write this as a fraction in SIMPLEST FORM!
3/4
300
Tell whether the number is prime or composite. 11
Prime, because it only has two factors one and itself.
300
Find the GCF of 64 and 120.
The GCF is 8.
300
Fill in the blank 3 12 __ = __ 5 ??
20
300
How do you know when a fraction is in simplest form?
When the only common factor the numerator and denominator have is 1.
300
Ashley has 27 violet marbles, 54 blue marbles, and 72 white marbles. She wants to divide the marbles into groups so that each group has the same number of each color. How many of each color are in each group? Hint: Find the GCF first.
3 violet, 6 blue, 8 white. 9 is the GCF.
400
Draw a factor tree for 68.
68 / \ 2 34 / / \ 2 2 17
400
Find the GCF of 14 and 35.
The GCF of 14 adn 35 is 7.
400
Write two fractions that are equivalent to 1/5
2/10, 10/50, 3/15
400
Simplify 12/40
3/10
400
You are planning a relay race for 48 students. Teams of equal size must be formed with at most 6 tsudents per team. What are the possible team sizes and how many teams would there be for each team size?
8 teams of 6 12 teams of 4 16 teams of 3 24 teams of 2
500
Write the prime factorization of 128.
2 to the 7th power
500
Find the GCF of 12, 20 and 30.
The GCF of 12, 20 and 30 is 2.
500
Which fraction is NOT equivalent to the given fraction? 1/8 A. 2/9 B. 2/16 C. 3/24 D. 5/40
A
500
Simplify 12/36
1/3
500
You are making bags of school supplies for your friends. You have 12 markers, 18 pens, and 30 pencils. You want to put the same number of each kind of supply into each bag. What is the greatest number of bags you can make?
6 bags.