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Divisibility Rules for 6PowerPoint Presentation

Divisibility Rules for 6

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Presentation Transcript

- The divisibility rule for 6 is as follows:
- If the number can be divided by BOTH 2 and 3
- Ex. Determine whether the number 876 453 is divisible by 6
- Solution:
- the last digit is not even, so the number is not divisible by 2.
- 8+7+6+4+5+3=33
- 3+3=6
- 6/2=3
- Since 3 is a factor of 33, the number is divisible by 3
- Therefore, 6 is not a factor of 876 453 because 2 is not a factor

- Solution:

Example #1

- Determine whether the number 839 729 384 192 is divisible by 6.
- Solution:
- 8+3+9+7+2+9+3+8+4+1+9+2= 65
- 6+5=11
- Therefore, 6 is not a factor of 839 729 384 192 because 3 is not a factor

Example#2

- Determine whether the number 45 672 978 is divisible by 6
- Solution:
- 4+5+6+7+2+9+7+8=48
- 4+8= 12
- 12/3=4
- Therefore, 6 is a factor of 45 672 978 because 2 and 3 are factors.

Your Turn

- Explain whether the number 186 is divisible by 6.
- 1+8+6= 15
- 1+5=6
- 6/3=2
- Yes it is.

Your Turn

- Explain whether the number 283 945 is divisible by 6.
- 2+8+3+9+4+5= 31
- 3+1=4
- 4/3
- No

Practice

- Page 13 #1
- STOP and CHECK

- Continue onto #3, 5, 6, 7, 8

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