1. Welcome Back to CMS. I hope you had a relaxing fall break
Welcome Back to CMS! I hope you had a relaxing fall break! Are you ready for the 2nd Quarter?

2. Student Progress Learning Chart
Set Up New Chart &
Lesson Reflection for
Chapter 4 Section 1

3. Math Learning Goal Students will understand number theory and fractions.

4. Today’s Learning Goal Assignment
Course 1
4-1
Divisibility
Today’s Learning Goal Assignment
Learn to use divisibility rules.

5. Students will understand number theory and fractions by being able to do the following:
Learn to use divisibility rules (4-1)

6. Course 1
4-1
Divisibility
6th Grade Math HW
Page 154
#9-28

7. 4-1
Divisibility
Course 1
Lesson Presentation

8. Chapter Career & Are you ready?
Chapter Career & Are you ready?

9. Kahn academy recognizing divisibility
Kahn academy recognizing divisibility

10. Today’s Learning Goal Assignment
Course 1
4-1
Divisibility
Today’s Learning Goal Assignment
Learn to use divisibility rules.

11. Insert Lesson Title Here
Course 1
4-1
Divisibility
Insert Lesson Title Here
Vocabulary
divisibility
composite number
prime number

12. 42 ÷ 6 = 7 Quotient 4-1 Divisibility
Course 1
4-1
Divisibility
A number is divisible by another number if the quotient is a whole number with no remainder.
42 ÷ 6 = 7
Quotient

13. 4-1 Divisibility Divisibility Rules A number is divisible by. . .
Course 1
4-1
Divisibility
Divisibility Rules
A number is divisible by. . .
Divisible
Not Divisible
2 if the last digit is even (0, 2, 4, 6, or 8).
3,978
4,975
3 if the sum of the digits is divisible by 3.
315
139
4 if the last two digits form a number divisible by 4.
8,512
7,518
5 if the last digit is 0 or 5.
14,975
10,978
6 if the number is divisible by both 2 and 3 48 20
9 if the sum of the digits is divisible by 9.
711 93
10 if the last digit is 0.
15,990
10,536

14. Additional Example 1A: Checking Divisibility
Course 1
4-1
Divisibility
Additional Example 1A: Checking Divisibility
Tell whether 462 is divisible by 2, 3, 4, and 5. 2 3 4 5
The last digit, 2, is even.
Divisible
The sum of the digits is = is divisible by 3.
Divisible
The last two digits form the number is not divisible by 4.
Not divisible
Not divisible
The last digit is 2.
So 462 is divisible by 2 and 3.

15. 4-1 Divisibility Try This: Example 1A
Course 1
4-1
Divisibility
Try This: Example 1A
Tell whether 114 is divisible by 2, 3, 4, and 5. 2 3 4 5
The last digit, 4, is even.
Divisible
The sum of the digits is = is divisible by 3.
Divisible
The last two digits form the number is not divisible by 4.
Not Divisible
Not Divisible
The last digit is 4.
So 114 is divisible by 2 and 3.

16. Additional Example 1B: Checking Divisibility
Course 1
4-1
Divisibility
Additional Example 1B: Checking Divisibility
Tell whether 540 is divisible by 6, 9, and 10. 6 9 10
The number is divisible by both 2 and 3.
Divisible
The sum of the digits is = is divisible by 9.
Divisible
The last digit is 0.
Divisible
So 540 is divisible by 6, 9, and 10.

17. 4-1 Divisibility Try This: Example 1B
Course 1
4-1
Divisibility
Try This: Example 1B
Tell whether 810 is divisible by 6, 9, and 10. 6 9 10
The number is divisible by both 2 and 3.
Divisible
The sum of the digits is = is divisible by 9.
Divisible
The last digit is 0.
Divisible
So 810 is divisible by 6, 9, and 10.

18. Course 1
4-1
Divisibility
Any number greater than 1 is divisible by at least two numbers—1 and the number itself. Numbers that are divisible by more than two numbers are called composite numbers.
A prime number is divisible by only the numbers 1 and itself. For example, 11 is a prime number because it is divisible by only 1 and 11. The numbers 0 and 1 are neither prime nor composite.

19. Prime and composite numbers
Prime and composite numbers

20. Course 1
4-1
Divisibility
Click to see which numbers from 1 through 50 are prime. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50

21. Additional Example 2A & 2B: Identifying Prime and Composite Numbers
Course 1
4-1
Divisibility
Additional Example 2A & 2B: Identifying Prime and Composite Numbers
Tell whether each number is prime or composite.
A. 23
divisible by 1, 23
prime
B. 48
divisible by 1, 2, 3, 4, 6, 8, 12, 16, 24, 48.
composite

22. 4-1 Divisibility Try This: Example 2A & 2B
Course 1
4-1
Divisibility
Try This: Example 2A & 2B
Tell whether each number is prime or composite.
A. 27
divisible by 1, 3, 9, 27
composite
B. 24
divisible by 1, 2, 3, 4, 6, 8, 12, 24
composite

23. Additional Example 2C & 2D: Identifying Prime and Composite Numbers
Course 1
4-1
Divisibility
Additional Example 2C & 2D: Identifying Prime and Composite Numbers
Tell whether each number is prime or composite.
C. 31
divisible by 1, 31
prime
D. 18
divisible by 1, 2, 3, 6, 9, 18
composite

24. 4-1 Divisibility Try This: Example 2C & 2D
Course 1
4-1
Divisibility
Try This: Example 2C & 2D
Tell whether each number is prime or composite.
C. 11
divisible by 1, 11
prime
D. 8
divisible by 1, 2, 4, 8
composite

25. Insert Lesson Title Here
Course 1
4-1
Divisibility
Insert Lesson Title Here
Lesson Quiz
Tell whether each number is divisible by 2, 3, 4, 5, 6, 9, and 10.
1. 256
2. 720
3. 615
Tell whether each number is prime or composite.
divisible by 2, 4
divisible by 2, 3, 4, 5, 6, 9, 10
divisible by 3, 5
prime
composite

26. Rules for divisibility song
Rules for divisibility song