Find the lowest common multiple ( lcm ) of 5 and 6

Prime factorization of 5 = 10 15 20 25 30

Prime factorization of 6 = 12 18 24 30

30 = the LCM

Find the lowest common multiple ( lcm ) of 4 ,12 , and 30

Prime factorization of 4= 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56,60

Prime factorization of 12= 24, 36, 48 ,60

Prime factorization 30= 60

60= the LCM

How do you find the LCM of polynomials?

Follow these steps to find the LCM of polynomials

1. Factor

2. Write each factor,not duplicating the "common" ones

3. Multiply these factors together

For example: Find the LCM of 4x^2 and 10xy

Step 1. Factor 4x^2 = 2*2 x*x 10xy = 2*5 x*y

Step 2. Write down each factor and not duplicate common ones

2*2*5*x*x*y

Step 3. Multiply these together 20x^2y

These problems are difficult to explain verbally. I feel watching someone work several examples will help understanding.

Common Core Standard: 6.NS.B.4 6th Grade Math

Lowest common multiple definition. The lowest common multiple or LCM, is the smallest positive integer that is divisible by two or more numbers. For example the lowest common multiple of 6 and 9 is 18, because it is the smallest positive integer both 6 and 9 will divide evenly into. What is the lowest common multiple of 3 and 4? The LCM is 12 because it is the lowest positive number both numbers will divide into.