6°LESSON 2: Prime and Composite Numbers

A number with only two factors,  $1$  and  the number itself. 

It is called numeró primo  in Spanish.

 $2$ is a prime. Why? Becasue  $2$  can only be divided by  $1$  and  $2$  

 $3$ is a prime. Why?  Because $3$  can only be divided by  $1$  and  $3$  

 $5$ is a prime . Why? Because $5$  can only be divided by  $1$  and  $5$  

A number that is not a prime.

It has more than  $2$  factors.

It is called numeró compuesto in Spanish.

 $4$  is a composite number. Why? Because it has the factors   $1,2,4$  

 $12$  is a composite number. Why? Because it has the factors   $1,2,3,4,6,12$  

Prime factorization is a way of writing the number as a product of its prime factors.

Example 1:   $4=2\cdot2$  

Example 2:  $6\ =\ 2\cdot3$  

Example 3:  $24\ =\ 2\cdot2\cdot2\cdot3$  

Example 4:  $60\ =2\cdot2\cdot3\cdot5$  

WORKSHEET 2. Upload photos of your work for grading.

QUIZ 2. This is done in Socrative. Just click the link provided in Google Classroom.