Learn Greatest Common Factor (GCF) & Least Common Multiple (LCM) - [7]

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In this lesson, we will learn how to find the greatest common factor (gcf) and least common multiple (lcm) of two numbers. These ideas are important when working with fractions, finding common denominators to add fractions, and other operations with fractions and numbers. The GCF is found by finding the factors of numbers and looking to find the largest (greatest) factor common between two numbers. Factors are simply numbers that can be divided into a number. To find the least common multiple, we just find the multiples of the given numbers and look for the smallest (least) multiple common to both lists.

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7 сен 2024

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Комментарии : 118

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@RamiAdrian 3 года назад

A prime number is a number has two factors only, one multiplied by another number such as 2, 3, 5, 7, 11… If a number has more than two factors, they are called composite number. It’s a good idea to memorize prime numbers because they are very useful for solving fraction problems such as reducing fractions and solving algebra problems.

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@poptartz24 11 месяцев назад

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@caribbeanman3379 7 месяцев назад

Another tip to keep in mind when creating a list of factors for a number: Once you've reached the halfway point you can stop, because a number can't have any *natural* factors greater than half its size - with the exception of the greater of its *identical* factors (1 and the number itself) and we already know as a given that the number is a factor of itself.

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@johnnielewis9896 Год назад

great method of deduction....now is factorization used in algebra?

@MathAndScience Год назад

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@tambuwalmathsclass 3 года назад

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@hemarajue2736 3 года назад

I think the GCF of any two consecutive numbers is one and LCM is their product.

@MathAndScience 3 года назад

Interesting!

@hemarajue2736 3 года назад

@@MathAndScience similarly,we can find the GCF and LCM of any two consecutive even numbers easily. The GCF is always two and LCM is obtained by dividing both numbers by two and multiplying their quotients along with two. Eg. 8,10 LCM=2. GCF --> 8/2=4, 10/2=5, 4×5×2=40.