0
Sometimes fractions have different denominators. These are called unlike fractions. When adding or subtracting fractions with unlike denominators, it is necessary to find a common denominator to get the correct answer. This is the same process as finding the least common multiple.
Example 1/30 + 1/42
Factor them.
2 x 3 x 5 = 30
2 x 3 x 7 = 42
Combine the factors, eliminating duplicates.
2 x 3 x 5 x 7 = 210, the lowest common denominator.
Add your answer:
Earn +20 pts
What is the least common denominator of two fractions?
The least common denominator is the least common multiple of the denominators of the fractions.
Why do you have to have a common denominator?
A common denominator is needed when adding or subtracting fractions of different denominators.
How are a common denominator and a common multiple different?
They are essentially the same. A common denominator is the common multiple of a set of denominators of a set of fractions.
What is the least common denominator of 9?
You need at least two numbers to find a common denominator.
What is the highest common denominator of 35 49 and 91?
It is infinity but the lowest common denominator is 3185
What is the common denominator of 56 and 7?
A common denominator is 7.A common denominator is 7.A common denominator is 7.A common denominator is 7.
What is the least common multiple of two ir more denominators?
That's the least common denominator or LCD.
What are the least common multiple of a denominator called?
The least common denominator.
What is a synonym for common denominator?
A few synonyms for common denominator are , common divisor, common measure, denominator, numerator
What is a common denominator of 20 and30?
A common denominator of 20 and 30 is 600. This is NOT the least common denominator, though.
What is the greatest common denominator of 9 and 15?
The greatest common denominator is infinite. The least common denominator is 45.
What is the common denominator of 8 and 10?
A common denominator, though not the least, is 80.
What is the greatest common denominator of 24 and 36?
There can be no greatest common denominator. For supose x is the greatest common denominator. ie 24 divides x and 36 divides x. Then 2x is a common denominator and 2x > x so 2x is a greater common denominator than the greatest common denominator. That contradiction implies that there is no greatest common denominator.
How do you add improper fractions if the denominator can't multiply into the other denominator?
You Ned to find a larger common denominator or multiply the denominators to gain a common denominator.
What Is the common denominator of seven and 12?
A common denominator is 84.
What is a common denominator for 74and3?
The least common denominator is 222.
What is the common denominator for 7and4 and3?
A common denominator is 84.
