Learn Divisibility Rules by Singing them! |

*they're*hard to remember, too! (and a memory song is only useful if you can figure out what it means when you go to do the math!)

In our home school, we do one type of memory song per day: Religion on Monday, Math Songs on Tuesday, History & Geography on Wednesday, and Science on Friday (yes, we only schedule 4 days of structured school per week). Singing this song every Tuesday makes those math problems a snap when they arise.

I omitted the tips for 7 & 11, as they are rather ungainly and time-consuming; it seems easier to just "do the math" and figure those out the old-fashioned way!

If you like this post, also check out

Multiplication Quick Tricks Memory Song

I got these tips from the internet, relying heavily on this chart from the Contented at Home blog, which I also encourage downloading as a great home school (or traditional school) resource.

Free Disivibility Chart

Here's a little video of the tune being played by an adorable little girl, in case you have trouble recalling it:

__Divisibility Song__

To the Tune of "Frere Jaques"

or "Are You Sleeping, Brother John"

(if you need a reminder of the tune, click the video, above)

If a number

ends in zero

then you know

that you can

easily divide it

by 2, 5, or 10

It's a Snap!

It's a Snap!

You can divide

numbers by two

if they're even

that's the test

you can divide numbers

by two if they're even

that's the test! That's the test!

You can divide

numbers by three

if their sum+

divides by three

You can divide

numbers

by three if their sum

divides by three

Yes you can!

You can divide

numbers by four

if the last

two digits

can divide by four

can divide by four

then you know

it will work!

You can divide

numbers by five

if their last

digit is

either 5 or zero

either 5 or zero

then you can divide by 5

You can divide

numbers by six

if you can

divide them

by both 2 and 3

by both 2 and 3

then you can

divide by 6!

You can divide

numbers by 8

if their last

three digits

can divide by 8

can divide by 8

then you know

it will work

You can divide

numbers by 9

if the sum+

divides by 9

you can divide numbers

by 9 if the sum

divides by 9

Yes you can!

You can divide

numbers by 10

if they end

in zero

You can divide numbers

by 10 if they end

in zero, in zero!

You can divide

numbers by twelve

if you can

divide them

by both 3 and 4

by both 3 and 4

then you can

divide by 12!

To check answers

in division

Multiply

your answer

by the left number *

(or the bottom number) **

then you'll know

that it's right!

__

__3_____

*When formatting Division questions like this: 5 ) 15 then it's the Left Number

** When formatting Division Questions as is common in Algebra

__15__=3 then it's the bottom number.

5

+A "sum" of a number means that you add up all the digits of a number till you get a single digit - that's the number's sum. For instance, the sum of 123 is 1+2+3= 6. And the sum of 12345 is 1+2+3+4+5=15 THEN 1+5 =6, So the sum of 12345 is also 6.

If you like this, you might want to check out my other Homeschooling Posts

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Design Your Own Mini Unit Study

Home School for Cheap or Free: Why Greek is Better than Latin!

Home School for Cheap or Free: Greek Reading

Home School for Cheap or Free: Greek Conversation

Teaching Math: Home School for Cheap or Free

Teaching Music: Homeschool for Cheap or Free

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What a great idea! Thanks for sharing at Together on Tuesdays :)

ReplyDeleteThanks so much - glad you liked it! Thanks for hosting! : )

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