Divisibility rules can help you easily identify which numbers are divisible by other numbers. That is especially helpful when you have to divide a big number. Memorize these rules, and you will be a dividing dynamo! This video uses cartoon animati...on to provide step-by-step instructions. A short, self-checking quiz and song are also included with this link.[more]

Instructor uses white board. Suitable for older elementary, middle school, and high school students.Students learn that a number is divisible by another if the first number can be divided by the second number without a remainder. For example, 14 is d...ivisible by 7 because 14 can be divided by 7 without a remainder. Students also learn to use the following divisibility rules. A number is divisible by 2 if the number is even. A number is divisible by 3 if the sum of the digits is divisible by 3. A number is divisible by 5 if the units digit is 0 or 5. A number is divisible by 6 if the number is divisible by both 2 and 3. A number is divisible by 9 if the sum of the digits is divisible by 9. And a number is divisible by 10 if the units digit is 0. (02:29)[more]

This animation with narration demonstrates the rules of identifying the divisibility of a numbers: 2,3,4,5,6,9, and 10. For elementary and middle school students. (05:49)

How do you know when a number can be divided by 2 or by 3? This slideshow contains the answers. This slideshow (26 slides) contains clearly-presented rules concerning division.

Instructor uses the video screen as a 'blackboard' to demonstrates how to find if a number is divisible by 8 without performing actual division. Gives a few examples. For elementary and middle school students. (01:29)

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