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Can the least common denominator of fractions be found by observing or by the use of prime numbers?
Wiki User
∙ 11y ago
Yes. Example: 1/30 and 1/42
2 x 3 x 5 = 30
2 x 3 x 7 = 42
2 x 3 x 5 x 7 = 210, the least common denominator.
Wiki User
∙ 11y ago
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What are fractions that have the same denominator called?
Like Fractions
Do you need a common denominator for all fractions before doing the order of operations?
You DO need a common denominator to add, subtract, or compare fractions. You DO NOT need a common denominator to multiply or divide fractions.
Why do you have to find a common denominator?
Addition or subtraction of fractions require "like" fractions: that is, fractions with the same denominator.
When dealing with fractions with two different numbers on the bottom this is a number which both bottom numbers divide into evenly?
Common Denominator
What do you call fractions with the same denominator?
They are called like or similar fractions.
Is it always necessary to find the least common denominator to compare the sizes of fractions?
When comparing fractions you must find a common denominator; by finding the least common denominator it will keep the numbers (numerators and denominator) smaller .
What is the greatest common denominator of 60?
In order to have a greatest common denominator, there has to be two numbers and they both have to be fractions. 60 has no greatest common denominator.
How do you add rational numbers?
By finding their common denominator & adding the top numbers of-the fractions. : )
How do I add improper fractions?
Change them into mixed numbers and add the integers and fractions together ensuring that the fractions have a common denominator.
How is adding fractions like adding whole numbers... How is it different?
Similarities: the sum does not depend on which number you start with (distributive)Differences: you must find a common denominator for the fractions (whole numbers have a common denominator [1]
What is the least common denominator of 5 over 12?
Two or more fractions or mixed numbers are required to have a least common denominator.
When adding or subtracting two fractions with denominators that are not equal what is the first step you take?
The first step to take is find the lowest common denominator of the fractions which can be done by finding the lowest common multiple of the numbers.
How do you change a fraction so they have the same denominator?
First, find a common denominator for the two (or more) fractions. Then, for each fraction, multiply numerator and denominator by the same number (different numbers for different fractions, though), to convert to the common denominator.
What is the least common denominator for the fractions 5656 and 3838?
There doesn't appear to be any fractions there but to find the LCD of fractions is done in the same way as finding the lowest common multiple of numbers.
What is the difference between a least common multiple and a least common denominator?
The Least (or Lowest) Common Multiple (LCM) is the smallest number that is a multiple of both numbers. For example: the LCM of 10 and 4 is 20, because both 10 and 4 go into 20 and 20 is the smallest number both 10 and 4 can go into. To be able to add or subtract fractions they must have the same denominator. If the denominators are different then the fractions must first be converted into equivalent fractions with a common denominator; any common denominator can be used, but by using the Least Common Multiple of the denominators as the new denominator it keeps the numbers smaller; this smallest denominator is known as the Least Common Denominator Thus the Least Common Denominator is the Least Common Multiple of the denominators of two (or more) fractions (used when adding or subtracting fractions with different denominators). As the Least Common Multiple is used most often with adding or subtracting fractions, it is often referred to as the Least Common Denominator (because the numbers being considered are usually denominators of fractions).
How do you get the common denominator for dividing fractions?
You don't need a common denominator to divide fractions.
What is the least common denominator of two fractions?
The least common denominator is the least common multiple of the denominators of the fractions.
