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...
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...