Khan Academy: Divisibility and Factors: Finding Factors of a Number

There's a lot to remember when it comes to math concepts. Help scholars get a head-start to learning division with a reference page offering divisibility rules for the numbers two, three, four, five, six, eight, nine, and 10. 

A great resource for any math teacher covering multiples, factors or square roots; this worksheet walks young mathematicians through the logic behind factoring and square roots with a systematic set of problems which gradually increase...

Examine the processes for determining the divisibility of a number. Some divisibility rules are simple, such as divisible by two or five, while others are more complex. The video explains the divisibility rules for numbers from two...

If your class has watched the Khan Academy video on recognizing divisibility, they will have a good foundation for this video on finding factors. Sal demonstrates how to find factors of a number by using the divisibility rules and...

This video on changing improper fractions to mixed numbers would nicely compliment the Khan Academy video on writing mixed numbers as improper fractions. Sal first shows students how to convert improper fractions. Then, he uses drawings...

Understanding place value is a basic mathematics skill. This Khan Academy video shows students how to write the number 14,897 in the expanded form. He explains that the 7 in the ones place is the same as 7x1, the 9 in the tens place is...

A video showing how to find the factors of given numbers.

Why you can add the digits to see if something is divisible by 3.

Why you can test divisibility by 9 by just adding the digits.

Worked example of basic divisibility tests.