Flashcards for:
LCM: Basic Method
What is an alternative method to find the LCM?
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Another method to find the LCM is called the Prime Factorization Method.
What does LCM stand for?
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L.C.M. stands for Least Common Multiple.
How do you find the Greatest Common Factor (GCF)?
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To get the Greatest Common Factor, you take two or more numbers, find the factors they have in common, and pick the greatest one.
How do you find the Least Common Multiple (LCM)?
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To get the Least Common Multiple, you take two or more numbers, find multiples that they have in common, and pick the smallest or least one.
What is the method to find multiples of a number?
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You can find multiples by multiplying the number by the sequence of whole numbers like 1, 2, 3, 4, 5, and so on, or by skip counting.
What are the first few multiples of 3?
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The multiples of 3 are 3, 6, 9, 12, 15, 18, 21, and so on.
What are the first few multiples of 4?
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The multiples of 4 are 4, 8, 12, 16, 20, 24, 28, and so on.
What is the Least Common Multiple of 3 and 4?
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The Least Common Multiple of 3 and 4 is 12.
What is the drawback of finding the LCM by listing multiples?
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You don't know upfront how many multiples you'll need to list, and it can be a lot of work for bigger numbers.
How can you minimize work when listing multiples?
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Start by calculating a few multiples of each number to see if you find a common multiple. If you don’t, keep calculating a few more each time until you do.
What is a simple example of finding LCM?
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For the numbers 2 and 5, skip counting gives 2, 4, 6, 8, 10 and 5, 10, with the LCM being 10.
What is the LCM of 12 and 14?
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The least common multiple of 12 and 14 is 84.
What is an alternative method to find the LCM?
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Another method to find the LCM is called the Prime Factorization Method.
What does LCM stand for?
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L.C.M. stands for Least Common Multiple.