This document introduces prime and composite numbers. It explains that factors are numbers that are multiplied to form a product. Students are asked to find all factors of numbers from 2 to 20 and create rectangles using those factors. The document states that a number is prime if it only has two factors, 1 and itself, while a number is composite if it has more than two factors. Students are assigned homework problems related to factors and prime/composite numbers.

1. Math 6:Whole Numbers
Prime and Composite numbers

2. Getting started
 3x6 = 18
 3 and 6 are FACTORS of 18.
 What are some other factors of 18?
 1 and 18, 2 and 9.
 Factors: Numbers that are multiplied to form a product

3. Let’sTry it!
 How many cubes are in the rectangle?
 What are factors of 16?
 Can you make another rectangle with
16 cubes?

4. Explore
 Create as many rectangles for the numbers 2 to 20.
 Create aT-chart and fill in all the factors

5. Connect
Number Factors
2 1,2
3 1,3
4 1,2,4
5
6
7
8
9
10

6. Connect
 How do you know you have found all the rectangles for each
number?
 What are the factors of 5? How do you know? (Make a
rectangle with 5 tiles)
 How many rectangles do you think you will be able to make
with 11 tiles?

7. Connect
 Suppose you have 23 tiles.You can only make one rectangle
because factors of 23 are only 1 and 23.
 A number that has only two factors: 1 and itself is called a
PRIME NUMBER.
 Suppose you have 24 tiles.You can make more than on
rectangle because the factors of 24 are 1,2,3,4,6,8,12, and 24.
 A number that has more than two factors is called a
COMPOSITE NUMBER.

8. In ClassWork
 pg. 46 #1, 4, 5, 8, 11

9. HOMEWORK
 Pg. 20