Download Homework 9.3 Greatest Common Factor

Name
Homework
9.3
Date
Greatest Common Factor
Different Ways to Find the GCF of 15 and 20
Way 1: Make a list.
15: 1, 3, 5, 15
20: 1, 2, 4, 5, 10, 20
Way 2: Use prime factorization.
15 ⫽ 3 ⫻ 5
20 ⫽ 22 ⫻ 5
The GCF is 5.
List the factors of each number. Then find the greatest common factor of the numbers.
1.
16, 42
2.
21, 25
3.
24, 56
4.
12, 30
Write the prime factorization using exponents of each number. Then find the greatest
common factor (GCF) of the numbers.
5.
24, 36
6.
21, 56
7.
45, 81
8.
50, 75
Problem Solving
9.
Tia made 50 cupcakes and 160 cookies
for a bake sale. She put the items in
packages with an equal number of
cupcakes and cookies. How many packages did she make? What was in each
package?
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Use with text pages 228–231.