Page 11 - NUMINO Challenge_D2
P. 11
1 Prime Factorization
Basic Concepts Prime Factorization
A number that has 1 and itself as its only factors, such as 2, 3, 5, 7, 11, 13, is
called a prime number.
To express a number as a product of prime numbers is called a prime
factorization. A factor tree can be useful to write the prime factorization of a
number. When using a factor tree, a number is divided into two numbers such
that the product of these two numbers is the original number. Division is stopped
when the last number of each branch becomes a prime number.
8 24 120
42 64 12 10
22 2 32 2 2 62 5
23
Example Write the prime factorization of each number below.
45 360
Class Notes
Fill in the blanks with the correct numbers to complete the factor trees shown below.
45 360
5 10
22
Therefore, the prime factorization of 45 is 45 5, and the prime
5.
factorization of 360 is 360 2 2 3
8 NUMINO Challenge D2
Basic Concepts Prime Factorization
A number that has 1 and itself as its only factors, such as 2, 3, 5, 7, 11, 13, is
called a prime number.
To express a number as a product of prime numbers is called a prime
factorization. A factor tree can be useful to write the prime factorization of a
number. When using a factor tree, a number is divided into two numbers such
that the product of these two numbers is the original number. Division is stopped
when the last number of each branch becomes a prime number.
8 24 120
42 64 12 10
22 2 32 2 2 62 5
23
Example Write the prime factorization of each number below.
45 360
Class Notes
Fill in the blanks with the correct numbers to complete the factor trees shown below.
45 360
5 10
22
Therefore, the prime factorization of 45 is 45 5, and the prime
5.
factorization of 360 is 360 2 2 3
8 NUMINO Challenge D2
