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How can knowing the greatest common factor and least common multiple help you when you add subtract and multiply fractions?
Wiki User
∙ 7y ago
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.
Wiki User
∙ 7y ago
Wiki User
∙ 7y agoFractions can be added or subtracted (in ratio form) if they are like fractions: that is if they have a common denominator. This must be a common multiple. It need not be the least common multiple but using the LCM instead of any common multiple will keep the numbers small (or smaller). Having carried out the addition or subtraction, the answer must be simplified - using the GCF.
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How do u subtract fractions?
multiply the fractions until they have common denominators and then subtract them
What is the difference between cross and across?
When you add or subtract fractions you cross multiply and when you multiply or divide fractions you across multiply.
What are the rules for subtracting fractions?
You multiply the fractions until the denominators are equal. Then, you subtract.
How do you subtract two fractions?
You have to find a common denominator, multiply them, subtract them and then simplify if you need to.
Why is finding the greatest common factor is useful for fractions?
It allows you to add and subtract the fractions with greater ease.
Why do you flip fractions?
So its easier to add subtract or most commonly multiply
Why is finding the least common multiple important?
It will help when you are trying to add and subtract fractions.
One may add subtract multiply and divide fractions once one has found?
One may add, subtract, multiply and divide fractions once one has found the common denominator. Horse Isle Real Time Quiz Answer: common denominator
What least common multiple can use to subtract two fractions with denomitors of 8 and 14?
It is: 56
What school subject is fractions related to?
Math is related to fractions. if you look in a math book or just online then one of the math topics is fractions. You learn how to divide, multiply, add and subtract, simplify and more about fractions and what to do with them.
What is the purpose of using lowest common multiple?
Finding the LCM helps you add and subtract fractions accurately.
How do you subtract fractions with different denominators?
By finding their lowest common denominator by means of their lowest common multiple
