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What are two common denominators for 3 over 8 and 5 over 6?
24 and 48 are two possible common denominators for 3/8 and 5/6.
What common denominators of 3 and 5 and 7 and 9?
Only 1.
What is the least common denominator of 3 and 5?
The Least Common Multiple of 3 and 5 is 15, which would be the denominator to use for fractions with the denominators 3 and 5.
What is the least common denominator for 3 and 5?
There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of a pair of fractions. If those numbers are denominators, the LCD is 15.
Why when adding fractions do you change the denominator?
If the denominators are not the same then yes.If the denominators are the same you can simply add the numerators:1/5 + 2/5 = 3/5because the denominators are all the same, and 1 + 2 = 3.If the denominators are different, simply adding the numerators will give the wrong answer:1/5 + 2/3 3/5 or 3/3.Instead, find the Least Common Multiple of the denominators (15 in this case) and convert both fractions to that denominator. Then you can go back to simply adding the numerators.1/5 = 3/152/3 = 10/153/15 + 10/15 = 13/15because 3 + 10 = 13.
What are two common denominators for 3 over 8 and 5 over 6?
24 and 48 are two possible common denominators for 3/8 and 5/6.
What common denominators of 3 and 5 and 7 and 9?
Only 1.
What is the least common denominator of 3 and 5?
The Least Common Multiple of 3 and 5 is 15, which would be the denominator to use for fractions with the denominators 3 and 5.
What would be the lowest common denominator if the denominators were 3 5 and 10?
The LCD of 3, 5, and 10 is 30.
What is the least common denominator for 3 and 5?
There is none because the Least Common Denominator (or LCD) is the Least Common Multiple (LCM) of the denominators of a pair of fractions. If those numbers are denominators, the LCD is 15.
What is a common denomonator for 5 3 4 and 2?
5,3,4, and 2 have many common denominators. What is the least common denominator of all of them?Let's look at the multiples of each number. We do this because common denominators are really common multiples of the denominators. And the LCD is really just the least common multiple (LCM) of the denominators.Starting with 2, the 3, and 4 and last 5 we have the following lists of multiples:2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,68,603,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,604,8,12,16,20,24,28,32,36,40,44,48,52, 56,605,10,15,20,25,30,35,40,45,50,55,60So 60 is the first common multiple and it is the least common denominator of 2, 3, 4 and 5. Note that we could also factor 2, 3, 4 and 5 into primes (2, 3 and 5 already are) So we have 2, 3, 2^2 and 5 We take the largest exponent possible from each and we have 3 x 2^2 x 5 = 20 x 3 = 60. This is the faster way to do this.
Why when adding fractions do you change the denominator?
If the denominators are not the same then yes.If the denominators are the same you can simply add the numerators:1/5 + 2/5 = 3/5because the denominators are all the same, and 1 + 2 = 3.If the denominators are different, simply adding the numerators will give the wrong answer:1/5 + 2/3 3/5 or 3/3.Instead, find the Least Common Multiple of the denominators (15 in this case) and convert both fractions to that denominator. Then you can go back to simply adding the numerators.1/5 = 3/152/3 = 10/153/15 + 10/15 = 13/15because 3 + 10 = 13.
What is the LCD of 5 and 3?
The lowest common denominator is also the only common denominator, 1. This is because 5 and 3 are prime numbers. The lowest common multiple is 15.
How do you add fraction with common denominators?
To add fractions w/ common denominators, like 2/5 + 1/5, you must ONLY add the numerator, or the top numeral.
How do you do least common denominators?
Find the LCM of the denominators. Since the LCM of 3 and 4 is 12, the least common denominator of 1/3 and 1/4 is 12.
How do you find a common denominator if the 3 denominators have nothing in common?
Multiply them together.
What is the least common denominator for fractions with denominators 2 3 and 5?
6 2x3x5=30 30 / 2 =15 30/3=10 30/5 =6
