Understanding+Numbers



Least Common Multiple Example video tutorial: https://www.khanacademy.org/math/pre-algebra/factors-multiples/least_common_multiple/v/least-common-multiple-lcm

Prime and Composite Example video tutorial: https://www.khanacademy.org/math/pre-algebra/factors-multiples/prime_numbers/v/recognizing-prime-numbers https://www.khanacademy.org/math/pre-algebra/factors-multiples/prime_numbers/v/prime-numbers

Greatest Common Factor video tutorial: https://www.khanacademy.org/math/pre-algebra/factors-multiples/greatest_common_divisor/v/greatest-common-divisor

Order of Operations video tutorial: https://www.khanacademy.org/math/pre-algebra/order-of-operations/order_of_operations/v/more-complicated-order-of-operations-example