1 / 7

Divisibility rules

Divisibility rules. 3 and 9 . Yesterday …. You learned the rules for divisibility A number that can be equally shared in whole parts is divisible by 2 if the number is even ( ends in 0,2,4,6,8,) Is divisible by 5 is it ends in 5 or 0 Is divisible by 10 is it ends in 0

mohawk
Download Presentation

Divisibility rules

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. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Divisibility rules 3 and 9

  2. Yesterday …. • You learned the rules for divisibility • A number that can be equally shared in whole parts is divisible by • 2 if the number is even ( ends in 0,2,4,6,8,) • Is divisible by 5 is it ends in 5 or 0 • Is divisible by 10 is it ends in 0 • Today we will learn the rules for divisibility by 3 and 9.

  3. There are similarities in rules for 3 & 9 • To find out is something is divisible by 9, add the digits. • 8217 • Add 8+2+1+7=18 • 18 is divisible by 9, therefore 8217 is divisible by 9. • To find out if something is divisible by 3 , add the digits. • 117 • Add 1 +1+ 7=9 • 9 is divisible by 3, therefore 117 is divisible by 3.

  4. Check out this you tube link Please put your head phones in … • 3 and 9 use the digit sum rule . Now it’s time for an annoying rap about it ! • http://www.youtube.com/watch?v=1ffvCtNZN9Q

  5. Ready for practice ? • Put your answers in your coil note book. • Which numbers are divisible by 3 ? Which by 9 ? • 117 b) 216 • c) 4125 d)729 • e) 8217 f)12 024

  6. Try this explanation http://www.youtube.com/watch?v=_-IbZ5Ih_nU&NR=1&feature=fvwp

  7. Ready for more practice ? • http://www.funtrivia.com/playquiz/quiz2534921d05d68.html • http://www.oswego.org/ocsd-web/match/dragflip.asp?filename=slanedivrules • Turn to page 12 in the grade 7 MMS brown text book to see and study the divisibility rules.

More Related