I am working on converting old anchor charts and notes to typed posters.

*Divisibility Rules Poster Options:*

## Color:

## Black and White:

Use these photos as a poster to display in your classroom, or print for use in student notebooks/binders. Here is the FREE .pdf: DivisibilityRulesPoster.

*So, what is this trick for the 7’s divisibility rules? *

Check it out:

- Double the last digit and subtract it from the remaining part of the number. If the answer is either 0 or it is divisible by 7, then the original number is divisible by 7.

Example:

- Start with the number: 1015.
- Isolate the last digit: 1015 .

- Double the last digit. 5 x 2 = 10.
- Subtract the result (10) from the remaining part of the number (101):
*101 – 10 = 91* - Determine whether your answer is equal to 0 or divisible by 7. If it is, the number is divisible by 7. If it is not, the number is not divisible by 7.

- 91 divided by 7 equals 13, which is a whole number.
- Since 91 is divisible by 7, that means 1015 is also divisible by 7.
- If you are curious, and don’t feel like working it out… 1015 divided by 7 equals 145.

It is probably easier just to do long division in most cases, but it is always fun to learn a new trick 😉

Will you email me?

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Sure, what do you need?

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I love this poster! Thanks for putting that together and allowing downloads. One question. Is it possible to include “0” under the list of even digits (divisible by 2)?

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I’m glad you like it! Yes, that is on my to do list anyways. I just finished adding “or 0” to the posters and re-posted. If you like the divisibility rules posters, check out my divisibility rules foldable post that shows how I made my divisibility rules foldable.

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