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How do you use greatest common factor with addition and subtraction of fractions?
Wiki User
∙ 11y ago
You don't. You use the GCF to reduce the answer once the addition or subtraction is complete.
Wiki User
∙ 11y ago
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Where is greatest common factor use?
The greatest common factor is used to reduce fractions.
What do you use greatest common factor for?
To reduce fractions
Greatest common factor life application?
One common application of greatest common factors is to simplify fractions. Note that you don't necessarily need the GREATEST common factor; you can simplify by dividing both numbers by any common factor, and then continue looking for additional factors.
Do you do factors of the greatest common factor or multiples?
When doing fractions it is the greatest common factor (GCF) and the least common multiple (LCM). You want the GCF when you are reducing fractions to their simplest form. When changing the denominators to a common one, you want the LCM.
What is the relationship between least common multiple and greatest common faction?
Least common multiple is needed to find the least common denominator when adding or subtracting fractions with different denominators Greatest common factor is needed when reducing fractions to their lowest terms
Why do you have to find a common denominator?
Addition or subtraction of fractions require "like" fractions: that is, fractions with the same denominator.
Why do common denominators lead to the correct answer?
In what type of problem exactly? For addition and subtraction of fractions
When dividing fractions do need a common denominator?
No. Common denominators are needed for addition and subtraction, not multiplication or division.
Do you need common denominators when subtracting fractions?
Yes. You need common denominators if you want to:Add fractionsSubtract fractionsCompare fractions ("which is larger?")You do not need common denominators to multiply or divide fractions. Thus, in the case of fractions, multiplication and division is actually easier than addition and subtraction.
What types of problems can be solved by using the least common multiple?
Adding and subtracting fractions.Problems involving the addition or subtraction of unlike fractions
How can knowing the greatest common factor and least common multiple help you when you add subtract and multiply fractions?
Knowing the least common multiple of the denominators will help you find a common denominator when adding and subtracting unlike fractions. Knowing the greatest common factor of the numerator and the denominator will help you reduce the fraction if possible.
What is the smallest common multiples is called?
It is usually called the least common multiple. But it can also be called the least/lowest common denominator when it is used for addition or subtraction of rational fractions.
When working with fractions and mixed numbers what 2 operations require that you find common denominators before beginning to work?
those two operations are addition and subtraction.
Do you have to have a common denominator when you are adding fractions?
Having a common denominator makes it easier to add or subtract fractions. You can also convert fractions to decimals and then do the addition or subtraction but that is really the same thing as having a common denominator of 10. 100. 1000. etc. Without a common denominator, you would have to mentally make adjustments for the values of fractions. Of course, that is really establishing a common denominator in your head.
What else Could you call the least common multiple in addition or subtraction problem involving fractions?
If you apply it to the denominators, you could call it the least common denominator.
How do you find fractions from least to greatest?
you have to compare the common fractions
Equivalent fractions using least common denominator?
In order to add and subtract fractions with unlike denominators, it is necessary to convert them to equivalent fractions with a common denominator. Example: 1/4 + 1/6 The LCM of 4 and 6 is 12. 1/4 = 3/12 1/6 = 2/12
