Adding and Subtracting Fractions

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

How do you add fractions with the same denominator?

Back

To add fractions with the same denominator, keep the denominator the same and add the numerators. For example, 1/4 + 2/4 = (1+2)/4 = 3/4.

Front

How do you subtract fractions with the same denominator?

Back

To subtract fractions with the same denominator, keep the denominator the same and subtract the numerators. For example, 3/5 - 1/5 = (3-1)/5 = 2/5.

Front

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

Back

The first step is to find a common denominator, which is a multiple of both denominators.

Front

How do you find a common denominator for 1/3 and 1/4?

Back

The least common denominator (LCD) of 1/3 and 1/4 is 12. Convert both fractions: 1/3 = 4/12 and 1/4 = 3/12.

Front

What is the process to simplify a fraction?

Back

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

Front

What is the GCF of 12 and 16?

Back

The GCF of 12 and 16 is 4.

Front

What is 5 5/8 - 3 2/8?

Back

5 5/8 - 3 2/8 = 2 3/8.

Front

What is 3/4 - 1/2?

Back

3/4 - 1/2 = 1/4.

Front

What is 3/20 + 3/4?

Back

3/20 + 3/4 = 9/10.