Adding & 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

What does the numerator in a fraction represent?

Back

The numerator indicates how many parts of the whole are being considered.

Front

What does the denominator in a fraction represent?

Back

The denominator shows the total number of equal parts the whole is divided into.

Front

What is the least common denominator (LCD)?

Back

The least common denominator is the smallest number that can be used as a common denominator for two or more fractions.

Front

How do you find the least common denominator of 1/2 and 1/3?

Back

List the multiples of each denominator (2: 2, 4, 6; 3: 3, 6) and find the smallest common multiple, which is 6.

Front

Can you add fractions with different denominators directly?

Back

No, you must first find a common denominator before adding fractions.

Front

What is the first step in adding fractions?

Back

Find the least common denominator (LCD) for the fractions.

Front

Add 1/4 + 1/4.

Back

1/4 + 1/4 = 2/4 = 1/2.

Front

Subtract 3/5 - 1/5.

Back

3/5 - 1/5 = 2/5.

Front

What is 1/2 + 1/3?

Back

1/2 + 1/3 = 3/6 + 2/6 = 5/6.