Using LCMs with Operations of Fractions

Front

What is the Least Common Multiple (LCM)?

Back

The Least Common Multiple (LCM) of two or more numbers is the smallest multiple that is exactly divisible by each of the numbers.

Front

How do you find the LCM of two numbers?

Back

To find the LCM of two numbers, list the multiples of each number and identify the smallest multiple that appears in both lists.

Front

What is the first step in adding or subtracting fractions with different denominators?

Back

The first step is to find the Least Common Multiple (LCM) of the denominators to create a common denominator.

Front

What is a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions, allowing them to be added or subtracted.

Front

How do you convert fractions to have a common denominator?

Back

To convert fractions to have a common denominator, multiply the numerator and denominator of each fraction by the necessary factor to reach the LCM.

Front

What is the LCM of 4 and 5?

Back

The LCM of 4 and 5 is 20.

Front

What is the LCM of 6 and 8?

Back

The LCM of 6 and 8 is 24.

Front

How do you subtract fractions?

Back

To subtract fractions, convert them to have a common denominator, then subtract the numerators and keep the common denominator.

Front

What is the result of 4/5 - 2/10?

Back

The result is 6/10.

Front

How do you add fractions?

Back

To add fractions, convert them to have a common denominator, then add the numerators and keep the common denominator.