rules of divisibility n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Rules of Divisibility PowerPoint Presentation
Download Presentation
Rules of Divisibility

Loading in 2 Seconds...

play fullscreen
1 / 10

Rules of Divisibility - PowerPoint PPT Presentation


  • 137 Views
  • Uploaded on

Rules of Divisibility. Making Math Easier. Divisibility Slide Show Your Name & Number Date Divisibility Rules. Example 642 is divisible by two because it ends in a two, which makes it an even number. Divisibility Rules A number is divisible

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Rules of Divisibility' - livia


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
rules of divisibility

Rules of Divisibility

Making Math Easier

divisibility slide show your name number date divisibility rules
Divisibility Slide Show Your Name & Number DateDivisibility Rules

Example

642 is divisible by two because it ends in a two, which makes it an even number.

Divisibility Rules

A number is divisible

by two if it is even.Another way to say a number is even is to say it ends in 0, 2, 4, 6, or 8.

Number

Two (2)

slide3

Divisibility Rules

A number is divisible

by three if the sum of the digits adds up to a multiple of three.

Example

423 is divisible by three because 4+2+3=9. Since nine is a multiple of three (or is divisible by three), then 423 is divisible by three.

Number

Three (3)

slide4

Divisibility Rules

A number is divisible

by four if it is even and can be divided by two twice.

Example

128 is divisible by four because half of it is 64 and 64 is still divisible by two.

Number

Four (4)

ALSO:

The last two numbers are divisible by four.

358912 ends in 12.

12 is divisible by 4 so 358912 is too.

slide5

Divisibility Rules

A number is divisible

by five if it ends in a five or a zero.

Example

435 is divisible by five because it ends in a five.

Number

Five (5)

slide6

Divisibility Rules

A number is divisible

by six if it is divisible by both two and three.

Example

222 is divisible by six because it is even, so it is divisible by two and its digits add up to six, which makes it divisible by three.

Number

Six (6)

slide7

Divisibility Rules

A number is divisible by 7 when you,

double and subtract the last digit from the rest of the digits.

Repeat the process for larger numbers.

If the difference is divisible by seven so is the original number.

Example

357 is divisible by seven because the last digit 7 doubled is 14.

35 – 14 = 21.

21 is divisible by 7, so 357 is divisible by 7.

Number

Seven (7)

slide8

Divisibility Rules

A number is divisible by eight when the last three numbers are divisible by eight.

Example

4168 is divisible by eight because 4168 ends in 168.

168 is divisible by 8 (8 goes into 16 twice and 8 once) therefore 4168 is divisible by 8.

Number

Eight (8)

slide9

Divisibility Rules

A number is divisible by nine if the sum of the digits adds up to a multiple of nine. This rule is similar to the divisibility rule for three.

Example

9243 is divisible by nine because 9+2+4+3=18

and 18 is a multiple of nine.

Number

Nine (9)

slide10

Divisibility Rules

A number is divisible by ten if it ends in zero. This rule is similar to the divisibility rule for five.

Example

730 is divisible by ten because it ends in zero.

Number

Ten (10)