add & subtract 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 in fractions?

Back

Unlike denominators are denominators that are not the same. To add or subtract fractions with unlike denominators, you must first find a common denominator.

Front

How do you find a common denominator for two fractions?

Back

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

Front

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

Back

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

Front

How do you add fractions with unlike denominators?

Back

Convert each fraction to an equivalent fraction with the common denominator, then add the numerators and keep the common denominator.

Front

How do you subtract fractions with unlike denominators?

Back

Convert each fraction to an equivalent fraction with the common denominator, then subtract the numerators and keep the common denominator.

Front

What is the formula for adding two fractions a/b and c/d?

Back

(a/b) + (c/d) = (a*d + b*c) / (b*d) where b and d are the denominators.

Front

What is the formula for subtracting two fractions a/b and c/d?

Back

(a/b) - (c/d) = (a*d - b*c) / (b*d) where b and d are 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 may be different.

Front

How can you simplify a fraction?

Back

To simplify a fraction, divide both the numerator and the denominator by their greatest common divisor (GCD).