Bridges Unit 2: Addition and Subtraction of 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

How do you subtract fractions with the same denominator?

Back

Subtract the numerators and keep the denominator the same. For example, 4/7 - 2/7 = (4-2)/7 = 2/7.

Front

How do you add fractions with the same denominator?

Back

Add the numerators and keep the denominator the same. For example, 2/5 + 1/5 = (2+1)/5 = 3/5.

Front

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

Back

Find a common denominator for both fractions.

Front

How do you find a common denominator for two fractions?

Back

The common denominator is usually the least common multiple (LCM) of the two denominators.

Front

What is the least common multiple (LCM)?

Back

The LCM of two numbers is the smallest number that is a multiple of both.

Front

How do you convert a fraction to an equivalent fraction?

Back

Multiply or divide both the numerator and the denominator by the same non-zero number.

Front

What is the process to solve for a missing numerator in a fraction equation?

Back

Rearrange the equation to isolate the numerator. For example, in 4/7 - ?/7 = 2/7, you can find ? by solving 4/7 - 2/7 = ?/7.