Hello, hello, hello!
Today we learned the divisibility rules! Tonight's homework is to complete the divisibility worksheet. Can't find your homework or were absent? Click here to get a printable copy of the worksheet.
First we defined the words Factor, Multiple and Product:
This picture may may the concept clearer:
Check out the rules:
For tonight's homework, you will determine which numbers are factors of various values. Here's an example of how you complete the homework: (ps- These are the first four problems... Feel free to copy them if it helps you learn!)
Now, we only went over a few divisibility rules. There are many others...
|2||If the last digit is even, the number is divisible by 2.|
|3||If the sum of the digits is divisible by 3, the number is also.|
|4||If the last two digits form a number divisible by 4, the number is also.|
|5||If the last digit is a 5 or a 0, the number is divisible by 5.|
|6||If the number is divisible by both 3 and 2, it is also divisible by 6.|
|7||Take the last digit, double it, and subtract it from the rest of the number;|
if the answer is divisible by 7 (including 0), then the number is also.
|8||If the last three digits form a number divisible by 8,|
then so is the whole number.
|9||If the sum of the digits is divisible by 9, the number is also.|
|10||If the number ends in 0, it is divisible by 10.|
|11||Alternately add and subtract the digits from left to right. (You can think of the first digit as being 'added' to zero.)|
If the result (including 0) is divisible by 11, the number is also.
Example: to see whether 365167484 is divisible by 11, start by subtracting:
[0+]3-6+5-1+6-7+4-8+4 = 0; therefore 365167484 is divisible by 11.
|12||If the number is divisible by both 3 and 4, it is also divisible by 12.|
|13||Delete the last digit from the number, then subtract 9 times the deleted|
digit from the remaining number. If what is left is divisible by 13,
then so is the original number.
And in a cute poem form...
I hope that this helps! If you forgot to bring in your Hot Pink sheet or didn't get it completed, please bring it in signed tomorrow! Thanks!!!!
-Miss K :)