Adding & 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 for fractions?

Back

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

Front

What is an equivalent fraction?

Back

An equivalent fraction is a fraction that represents the same value as another fraction, even though the numerator and denominator are different.

Front

How do you add fractions with unlike denominators?

Back

1. Find a common denominator. 2. Convert each fraction to an equivalent fraction with the common denominator. 3. Add the numerators and keep the common denominator.

Front

How do you subtract fractions with unlike denominators?

Back

1. Find a common denominator. 2. Convert each fraction to an equivalent fraction with the common denominator. 3. Subtract the numerators and keep the common denominator.

Front

What is the first step in solving a problem with fractions?

Back

Identify if the fractions have the same denominator or if you need to find a common denominator.

Front

If Christine ate 1/6 of a pie and her brother ate 1/3, how do you find out how much is left?

Back

Convert 1/3 to 2/6 to have a common denominator, then subtract: 1 - (1/6 + 2/6) = 1/2.

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Back

Front

What is a mixed number?

Back

A mixed number is a whole number combined with a fraction, such as 1 1/2.