7/28/2019 Div is Ability Rules

1/33

2, 3, 4, 5, 6, 9, 10

7/28/2019 Div is Ability Rules

2/33

Divisible BY

What does it mean?

7/28/2019 Div is Ability Rules

3/33

Divisible by means:

If you divide one number by another, the result isa whole number WITHOUT a remainder.

Examples:12 6 = 2 No remainder15 5 = 3 No remainder

7/28/2019 Div is Ability Rules

4/33

Divisibility Rule 2 A number is divisible by 2 if the

last digit is even. (0, 2, 4, 6, 8)

Examples: 7 8 3470

Review Even numbers: ghosteven

http://www.oswego.org/ocsd-web/games/Ghostblasterseven/ghosteven.htmlhttp://www.oswego.org/ocsd-web/games/Ghostblasterseven/ghosteven.html

7/28/2019 Div is Ability Rules

5/33

Now You Try:Which number IS NOT divisible by 2?572 1464 249

Need More Practice: Numbers Divisible by 2

http://www.321know.com/fra72_x3.htmhttp://www.321know.com/fra72_x3.htm

7/28/2019 Div is Ability Rules

6/33

WONDERFUL

7/28/2019 Div is Ability Rules

7/33

It ends in a 0,2, 4, 6, or 8.

7/28/2019 Div is Ability Rules

8/33

Divisibility Rule 3 A number is divisible by three if the

sum of the digits is divisible by 3.Examples:

75 7 + 5 = 12 12 3 = 4 No Remainder

369 3 +6 + 9 = 18 18 3 = 6 No Remainder

7/28/2019 Div is Ability Rules

9/33

Now You Try:Which number IS NOT divisible by 3?572 1464 279

Need More Practice: Numbers Divisible by 3

http://www.321know.com/fra72_x4.htmhttp://www.321know.com/fra72_x4.htm

7/28/2019 Div is Ability Rules

10/33

The sum isdivisible by 3.

7/28/2019 Div is Ability Rules

11/33

WONDERFUL

7/28/2019 Div is Ability Rules

12/33

Divisibility Rule 4 A number is divisible by 4 if the last two

digits are divisible by 4.

Examples:1320 20 4 = 5

672 72 4 = 18

7/28/2019 Div is Ability Rules

13/33

Now You Try:Which number IS NOT divisible by 4?564 4101 188

Need More Practice: Numbers Divisible by 4

http://www.321know.com/fra72_x5.htmhttp://www.321know.com/fra72_x5.htm

7/28/2019 Div is Ability Rules

14/33

WONDERFUL

7/28/2019 Div is Ability Rules

15/33

The last 2 digits aredivisible by 4.

7/28/2019 Div is Ability Rules

16/33

Divisibility Rule 5 A number is divisible by 5 if the last

digit is a 0 or 5.

Examples:

615 ends in a 5

1480 ends on a 0

7/28/2019 Div is Ability Rules

17/33

Now You Try:Which number IS NOT divisible by 5?

9820 779 560

Need More Practice: Numbers Divisible by 5

http://www.321know.com/fra72_x6.htmhttp://www.321know.com/fra72_x6.htm

7/28/2019 Div is Ability Rules

18/33

The number ends in a

zero or a five.

7/28/2019 Div is Ability Rules

19/33

Wonderful

7/28/2019 Div is Ability Rules

20/33

Divisibility Rule 6 A number is divisible by 6 when it is divisible by

2 AND 3. (prime numbers)

Examples:408 ends in an even number (2 rule)

sum of the digits is divisible by 3Review prime and composite numbers: Prime and Composite Numbers

http://www.321know.com/fra63ax2.htmhttp://www.321know.com/fra63ax2.htm

7/28/2019 Div is Ability Rules

21/33

Now You Try:Which number IS NOT divisible by 6?

8700 523 7602

Need more practice? Numbers Divisible by 6

http://www.321know.com/fra72_x7.htmhttp://www.321know.com/fra72_x7.htm

7/28/2019 Div is Ability Rules

22/33

Way To Go!!

7/28/2019 Div is Ability Rules

23/33

This number is divisible

by 2 and 3.

7/28/2019 Div is Ability Rules

24/33

Divisibility Rule 9 A number is divisible by 9 if the sum of

the digits is divisible by 9.

Examples:963 9 + 6 + 3 = 18 18 9 = 2

5445 5 + 4 + 4 + 5 =18 18 9 =2

7/28/2019 Div is Ability Rules

25/33

Now You Try:Find the number that IS NOT divisible by

9.

9873 636 5541

Need More Practice: Numbers Divisible by 9 and 10

http://www.321know.com/fra72_x2.htmhttp://www.321know.com/fra72_x2.htm

7/28/2019 Div is Ability Rules

26/33

The sum of the digits is

divisible by 9.

7/28/2019 Div is Ability Rules

27/33

Great Job!!!

7/28/2019 Div is Ability Rules

28/33

Divisibility Rule 10 A number is divisible by 10 is it ends in a

ZERO.

Example:7630 ends in a zero

410 ends in a zero

7/28/2019 Div is Ability Rules

29/33

Now You Try:Find the number that IS NOT divisible by

ten.

56,920 7537 870

7/28/2019 Div is Ability Rules

30/33

The number ends in a ZERO.

7/28/2019 Div is Ability Rules

31/33

Way To Go!!

7/28/2019 Div is Ability Rules

32/33

Congratulations!Complete two of the three assignments.

You may complete them on your

computers but print out your answersheet.

Assignment 1.doc

chart.doc assignment3.doc

http://f/Final_Projects/Carol%20Novisk/Assignment%201.dochttp://f/Final_Projects/Carol%20Novisk/chart.dochttp://f/Final_Projects/Carol%20Novisk/assignment3.dochttp://f/Final_Projects/Carol%20Novisk/assignment3.dochttp://f/Final_Projects/Carol%20Novisk/chart.dochttp://f/Final_Projects/Carol%20Novisk/Assignment%201.doc

7/28/2019 Div is Ability Rules

33/33

Now that you have

completed your twoassignments, feel free togo to the following sites.

THEY ARE SOOOOO MUCHFUN!!!!!!

Fractions vectorkids -divisibility rules

Gamequarium Division Games

http://www.aaamath.com/fra.htmlhttp://www.vectorkids.com/vkdivisible.htmhttp://www.gamequarium.com/division.htmlhttp://www.gamequarium.com/division.htmlhttp://www.vectorkids.com/vkdivisible.htmhttp://www.vectorkids.com/vkdivisible.htmhttp://www.vectorkids.com/vkdivisible.htmhttp://www.aaamath.com/fra.html