Download presentation

Presentation is loading. Please wait.

1
**Divisibility and Mental Math**

Lesson 3-1

2
Vocabulary A number is divisible by another number if it can be divided into and result in a remainder of 0. 24 is divisible by 4, because 24 ÷ 4 = 6. 24 is not divisible by 5, because 24 ÷ 5 = 4.8 (or 4R4). An even number ends with a 0, 2, 4, 6, or 8. An odd number ends with a 1, 3, 5, 7, or 9.

3
**Divisibility Rules 2 divides into all even numbers.**

3 divides into a number if the sum of the digits of that number is divisible by 3. 5 divides into numbers that end with a 5 or 0. 9 divides into a number if the sum of the digits of that number is divisible by 9. 10 divides into numbers that end with 0.

4
**Example: Test each number for divisibility by 3.**

216 = 9 9 is divisible by 3, so 216 is divisible by 3. yes 437 = 14 14 is not divisible by 3, so 437 is not divisible by 3. no

5
**Example: Test the number for divisibility by 2, 5, or 10.**

454,320 2 works because the number is even. 5 works because the number ends with 0. 10 works because the number ends with 0. = 18. Is the number divisible by 9? 18 is divisible by 9, so 454,320 is also divisible by 9.

6
Homework Time

Similar presentations

OK

Divisibility Rules. Divisibility What is Divisibility ? Divisibility means that after dividing, there will be NO remainder.

Divisibility Rules. Divisibility What is Divisibility ? Divisibility means that after dividing, there will be NO remainder.

© 2018 SlidePlayer.com Inc.

All rights reserved.

Ads by Google

Ppt on case study change management Ppt on 21st century skills map Ppt on power sector in india Ppt on places in our neighbourhood health Ppt on business plan example Ppt on inhabiting other planets outside the solar Ppt on oxygen cycle and ozone layer Ppt on crime file management system in java 3d backgrounds for ppt on social media Ppt on product life cycle with examples