Curated Video
Divisibility Rules for 6, 9 and 10
How can we test whether a whole is divisible by 6? By 9? 10? In this video, we will learn the rules to tell whether a whole number is divisible by 6, 9, or 10!
Curated Video
Determining Divisibility: Multiples of 2-5 and Ten
In this video, the teacher explains how to determine if a whole number is a multiple of 2, 5, or 10 by using divisibility rules. The teacher reviews multiplication fact families and demonstrates how to identify factors and multiples. The...
Khan Academy
Common Divisibility Examples, Factors and Multiples, Pre-Algebra
Equipped with several examples from the attached module and from standardized tests, Sal takes viewers through the process of prime factorization and divisibility. He demonstrates each skill several times with many different numbers,...
Khan Academy
Recognizing Divisibility, Factors and Multiples, Pre-Algebra
The divisibility rules are invaluable tools to possess. Sal teaches students to recognize divisibility using the divisibility rules. He explains why 380 is divisible by some numbers and not by others. Tip: Create a handout on the...
Khan Academy
Finding Factors of a Number, Factors and Multiples, Pre-Algebra
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...
Corbett Maths
Algebraic Proof
Proofs do not exist only in geometry. The video shows the class different ways that proofs appear in algebra. Pupils work through a variety of algebraic proofs involving the divisibility of an algebraic expression or whether it is even...
TED-Ed
Can You Solve the Fish Riddle?
Riddles are a great way to encourage learners to develop their logical thinking skills, and the fish riddle offers the perfect challenge. Viewers must determine how to rescue a series of tanks containing an endangered species of fish.
Krista King Math
Divisibility
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...
Scholastic
Study Jams! Divisibility Rules
Learning division is a challenge for many young mathematicians, but this presentation on divisibility rules can make it much easier. Seven different rules are clearly explained and modeled with the support of multiple examples. Consider...
Curated OER
How Do You Find All the Factors of a Number?
How do you find the factors of a given number? The teacher will show you how to use a table, test out your answers, and then write all your factors in a list. If you know the divisibility rules, that will also help you out.
Curated OER
How Do You Check if a Number is Divisible by 2, 3, 5, 6, and 10?
How will learning about the divisibility rules help you do better in math? Well, if you have multi-digit numbers to factor, these rules will definitely help you factor numbers more quickly.
Curated OER
How Do You Know if a Number is Divisible by 2,3, 5, 6, or 10?
So, you have a large number that is being divided by a smaller number. Learn a few tricks to make dividing a little more palatable. 2-is it even, 3-do the digits add up to a multiple of three, 5-does it end in 0 or 5, 6-is it divisible...
Curated OER
What Does Divisibility Mean?
What do divisibility and factoring have to do with each other? Well, if a whole number is the divisor and a whole number is the answer then both those numbers are factors of the number being divided. But if the answer is a decimal number...
Curated OER
How Do You Find All the Factors of a Number?
How do you find the factors of a given number? The teacher will show you how to use a table, test out your answers, and then write all your factors in a list. If you know the divisibility rules, that will also help you out.
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Recognizing Divisibility
This video explains how to test whether a number is divisible by a list of other numbers under 10. Practice problems are available. [6:26]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Common Divisibility Examples
This video shows how to determine the prime factorization of a number to determine divisibility. Practice problems are available. [8:13]
Math Playground
Math Playground: Divisibility Rules
This video illustrates the divisibility rules for factors 2, 3, 4, 5, 6, 8, 9 and 10.
Khan Academy
Khan Academy: Prime Factorization: Common Divisibility Examples
This video shows how to determine the prime factorization of a number to determine divisibility.
Khan Academy
Khan Academy: Divisibility and Factors: Divisibility Intuition
A video showing how to find the factors of given numbers.
Khan Academy
Khan Academy: Divisibility Tests: Divisibility Tests for 2, 3, 4, 5, 6, 9, 10
Worked example of basic divisibility tests.