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How do you find the common denominator? - Answers

mulitply the denominators you are working with.ex. 4/5 + 2/35 x 3=1515 is the common denominator.Now, we multiply the numerators by the old denominators4 x 3 = 122 x 5 = 10now add them12 + 10 = 22put it on the denominator22/15, or 1 7/15It's the same as finding the LCM.Example: 5/30 and 6/42Factor them.2 x 3 x 5 = 302 x 3 x 7 = 42Combine the factors, eliminating duplicates.2 x 3 x 5 x 7 = 210, the LCM5/30 = 35/210 6/42 = 30/210Now you can add them.By definition you write the multiples of each and find the one that is in both lists. the one that is always in both lists is the product of the denominators. That might give you one that is very large. That is why the least common multiple of the two denominators is the best to use.Prime factor each denominator.Choose each factor that was used the most. and multiply them,5/18 + 7/2718=2x3x327=3x3x3common denominator or LCM=2x3x3x3 or 54



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How do you find the common denominator? - Answers

https://math.answers.com/other-math/How_do_you_find_the_common_denominator

mulitply the denominators you are working with.ex. 4/5 + 2/35 x 3=1515 is the common denominator.Now, we multiply the numerators by the old denominators4 x 3 = 122 x 5 = 10now add them12 + 10 = 22put it on the denominator22/15, or 1 7/15It's the same as finding the LCM.Example: 5/30 and 6/42Factor them.2 x 3 x 5 = 302 x 3 x 7 = 42Combine the factors, eliminating duplicates.2 x 3 x 5 x 7 = 210, the LCM5/30 = 35/210 6/42 = 30/210Now you can add them.By definition you write the multiples of each and find the one that is in both lists. the one that is always in both lists is the product of the denominators. That might give you one that is very large. That is why the least common multiple of the two denominators is the best to use.Prime factor each denominator.Choose each factor that was used the most. and multiply them,5/18 + 7/2718=2x3x327=3x3x3common denominator or LCM=2x3x3x3 or 54



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https://math.answers.com/other-math/How_do_you_find_the_common_denominator

How do you find the common denominator? - Answers

mulitply the denominators you are working with.ex. 4/5 + 2/35 x 3=1515 is the common denominator.Now, we multiply the numerators by the old denominators4 x 3 = 122 x 5 = 10now add them12 + 10 = 22put it on the denominator22/15, or 1 7/15It's the same as finding the LCM.Example: 5/30 and 6/42Factor them.2 x 3 x 5 = 302 x 3 x 7 = 42Combine the factors, eliminating duplicates.2 x 3 x 5 x 7 = 210, the LCM5/30 = 35/210 6/42 = 30/210Now you can add them.By definition you write the multiples of each and find the one that is in both lists. the one that is always in both lists is the product of the denominators. That might give you one that is very large. That is why the least common multiple of the two denominators is the best to use.Prime factor each denominator.Choose each factor that was used the most. and multiply them,5/18 + 7/2718=2x3x327=3x3x3common denominator or LCM=2x3x3x3 or 54

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      mulitply the denominators you are working with.ex. 4/5 + 2/35 x 3=1515 is the common denominator.Now, we multiply the numerators by the old denominators4 x 3 = 122 x 5 = 10now add them12 + 10 = 22put it on the denominator22/15, or 1 7/15It's the same as finding the LCM.Example: 5/30 and 6/42Factor them.2 x 3 x 5 = 302 x 3 x 7 = 42Combine the factors, eliminating duplicates.2 x 3 x 5 x 7 = 210, the LCM5/30 = 35/210 6/42 = 30/210Now you can add them.By definition you write the multiples of each and find the one that is in both lists. the one that is always in both lists is the product of the denominators. That might give you one that is very large. That is why the least common multiple of the two denominators is the best to use.Prime factor each denominator.Choose each factor that was used the most. and multiply them,5/18 + 7/2718=2x3x327=3x3x3common denominator or LCM=2x3x3x3 or 54

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