# Divisibility Rules Poster Options

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

# Divisibility Rules Poster Options:

## 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:

• Isolate the last digit:  1015 .
1. Double the last digit.  5 x 2 = 10.
2. Subtract the result (10) from the remaining part of the number (101):  101 – 10 = 91
3. 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 😉

Check out my post on making a divisibility rules foldable.

## 4 thoughts on “Divisibility Rules Poster Options”

1. Jennifer says:

Will you email me?

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2. Sarah says:

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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