Adding Fractions with Unlike Denominators

Front

What is a common denominator?

Back

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

Front

How do you find a common denominator for two fractions?

Back

To find a common denominator, list the multiples of each denominator and identify the smallest multiple that appears in both lists.

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) is the smallest multiple that two or more numbers share.

Front

What is the LCM of 5 and 6?

Back

The LCM of 5 and 6 is 30.

Front

How do you add fractions with unlike denominators?

Back

To add fractions with unlike denominators, first find a common denominator, convert each fraction to an equivalent fraction with that denominator, and then add the numerators.

Front

What is the first step in adding 1/18 and 5/6?

Back

The first step is to find a common denominator for the fractions.

Front

What is the common denominator for 1/18 and 5/6?

Back

The common denominator for 1/18 and 5/6 is 18.

Front

How do you convert 5/6 to a fraction with a denominator of 18?

Back

To convert 5/6 to a fraction with a denominator of 18, multiply both the numerator and denominator by 3, resulting in 15/18.

Front

What is 1/18 + 5/6?

Back

1/18 + 5/6 = 16/18.

Front

How do you add mixed numbers?

Back

To add mixed numbers, first add the whole numbers, then add the fractions, and if necessary, convert the result into a mixed number.