Subtract Fractions with Unlike Denominators

Front

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

Back

Find a common denominator for the fractions.

Front

How do you find a common denominator for two fractions?

Back

Multiply the denominators of the two fractions together or find the least common multiple (LCM) of the denominators.

Front

What is the formula for subtracting fractions?

Back

If \( \frac{a}{b} - \frac{c}{d} \), then the result is \( \frac{a \cdot d - b \cdot c}{b \cdot d} \) after finding a common denominator.

Front

What is the result of \( \frac{5}{4} - \frac{1}{2} \)?

Back

The result is \( \frac{6}{8} \) or simplified to \( \frac{3}{4} \).

Front

What is the result of \( \frac{2}{5} - \frac{1}{4} \)?

Back

The result is \( \frac{3}{20} \).

Front

What is the result of \( \frac{6}{5} - \frac{1}{2} \)?

Back

The result is \( \frac{7}{10} \).

Front

What is the result of \( \frac{1}{3} - \frac{1}{8} \)?

Back

The result is \( \frac{5}{24} \).

Front

What is the result of \( \frac{9}{5} - \frac{6}{7} \)?

Back

The result is \( \frac{33}{35} \).

Front

What does it mean to simplify a fraction?

Back

To simplify a fraction means to reduce it to its lowest terms by dividing the numerator and denominator by their greatest common divisor (GCD).

Front

What is the greatest common divisor (GCD)?

Back

The GCD is the largest positive integer that divides each of the integers without leaving a remainder.