how do you do lcm i know i did it in like 1st grade but i need helpp!!
Check this site.
http://www.helpwithfractions.com/least-common-multiple.html
If you do one of your own problems, we'll be glad to check it for you.
To find LCM you must list some of the multiples of the numbers and then find the ones that match which are the same.
eg: Find the LCM of 3 and 5
multiples of 3:3,6,9,12,15
multiples of 5:5,10,15,20,25
So,as you can see the LCM would be 15
Finding the least common multiple (LCM) of two or more numbers can be done using a method called prime factorization. Here's a step-by-step explanation of how to find the LCM:
1. Start by listing the prime factors of each number. Prime factors are the prime numbers that multiply together to give the original number. For example, to find the prime factors of 12, you would divide it by prime numbers starting from 2 until no more divisions are possible: 12 ÷ 2 = 6 ÷ 2 = 3. The prime factors of 12 are 2, 2, and 3.
2. Repeat this process for each number you want to find the LCM of, listing their prime factors alongside the previous ones.
3. Identify the highest power of each prime factor that appears in any of the numbers. This means taking the maximum count of each factor. For example, if the prime factor 2 appears twice in one number, but only once in another, you would take the maximum count (which is 2).
4. Multiply all the prime factors together, raising each to its highest power. This will give you the LCM of the numbers. For example, if the prime factors are 2, 2, 3, 5, and the highest powers are 2, 1, 1, 1 respectively, you would calculate: LCM = 2^2 × 3^1 × 5^1 = 60.
So, to find the LCM of any two or more numbers, follow these steps to determine their prime factors, identify the highest powers, and then multiply them together.
If you have specific numbers you would like the LCM for, please provide them and I can guide you through the process.