Adding and Subtracting Fractions with Unlike Denominators

Front

What is a fraction?

Back

A fraction represents a part of a whole and consists of a numerator (top number) and a denominator (bottom number).

Front

What does it mean to have unlike denominators?

Back

Unlike denominators are when the bottom numbers of two or more fractions are different.

Front

How do you find a common denominator?

Back

To find a common denominator, identify the least common multiple (LCM) of the denominators.

Front

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

Back

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

Front

What is 1/2 + 1/3?

Back

1/2 + 1/3 = 5/6 (common denominator is 6).

Front

What is 3/4 - 1/8?

Back

3/4 - 1/8 = 5/8 (common denominator is 8).

Front

What is the result of 2/5 - 1/10?

Back

2/5 - 1/10 = 3/10 (common denominator is 10).

Front

What is a mixed number?

Back

A mixed number is a whole number combined with a proper fraction, like 1 1/2.

Front

How do you convert an improper fraction to a mixed number?

Back

Divide the numerator by the denominator; the quotient is the whole number, and the remainder is the new numerator.

Front

What is the result of 3/9 + 1/3?

Back

3/9 + 1/3 = 3/9 + 3/9 = 6/9 = 2/3 (common denominator is 9).