1. Ways to Check for Divisibility
Divisibility Rules
Sound=20century
Ways to Check for Divisibility

2. All numbers are divisible by 1
Dividing By 1
All numbers are divisible by 1
All 2 easy

3. Are these numbers divisible by 1?
Now You Try
Are these numbers divisible by 1?
578
398 48
1903
490

4. Dividing by 2 All even numbers are divisible by 2
Even numbers are numbers that end with either 2, 4, 6, 8, or 0
groovy

5. Are these numbers divisible by 2?
Now You Try
Are these numbers divisible by 2?
458
1279
759
555
1050

6. Dividing by 3 Add up the digits of the number
If that number is divisible by 3, then the original number is
If your sum is still a big number, continue to add the digits
Nice

7. Dividing by 3 3 7 8
For example, take the number
Add up the digits of the number 18 7 + 3 + 8 =
If that number is divisible by 3, then the original number is
Is 18 divisible by 3?
Oh yeah!
If your sum is still a big number, continue to add the digits
1 + 8 = 9
Is 9 divisible by 3?

8. Are these numbers divisible by 3?
Now You Try
Are these numbers divisible by 3?
639 56 86
360
468

9. Dividing by 4 If the last 2 digits together are divisible by 4
Example: 328 ends in 28.
Can 28 be divided by 4?
Yes 28 / 4 = 7
Since 4 goes into 28, 4 will divide into 328.
Great scott

10. Are these numbers divisible by 4?
Now You Try
Are these numbers divisible by 4?
584
261 56
920
767

11. Dividing by 5 If the number ends in 5 or 0. it is divisible by 5.
Example: 235 end is a 5, so it is divisible by 5
230 ends in a 0, so it is divisible by 5
Great balls of fire

12. Are these numbers divisible by 5?
Now You Try
Are these numbers divisible by 5?
554
6890
345
902
845

13. Dividing by 6 If the number is divisible by 2, and . . .
Then it is divisible by 6.
nice

14. Are these numbers divisible by 6?
Now You Try
Are these numbers divisible by 6?
897
258
630
345 84

15. If that number is divisible by 9 then your number is divisible by 9
Dividing by 9
Similar to dividing by 3
Add up digits
If that number is divisible by 9 then your number is divisible by 9
Example: 972
= 18 and 9 will divide into 18, so 972 is also divisible by 9.

16. Dividing by 9
For example, take the number 924,561
Add up the digits of the number 27 9 + 2 + 4 + 5 + 6 + 1 =
If that number is divisible by 3, then the original number is
Is 27 divisible by 9?
Oh yeah!
If your sum is still a big number, continue to add the digits
2 + 7 = 9
Is 9 divisible by 9?

17. Are these numbers divisible by 9?
Now You Try
Are these numbers divisible by 9?
578
398 48
1903
490

18. Dividing by 10
If the number ends with a 0, then it is divisible by ten.
Example – 90 end in a 0, so it is divisible by ten.

19. Are these numbers divisible by 10?
Now You Try
Are these numbers divisible by 10?
578
398 48
1903
490

20. REVIEW Divisible by 1 Divisible by 2 Divisible by 3 Divisible by 4
Is this the end

21. Assignment
Tell what each number is divisible by, either 2, 3, 4, 5, 6, 9, or 10
186 85 69
298
744
952
3650
2738
1132
5084