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

What does it mean to add fractions?

Back

Adding fractions involves combining the parts represented by the fractions. If the denominators are the same, add the numerators. If they are different, find a common denominator first.

Front

What does it mean to subtract fractions?

Back

Subtracting fractions involves taking away the parts represented by the second fraction from the first. If the denominators are the same, subtract the numerators. If they are different, find a common denominator first.

Front

How do you find a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions. It is often the least common multiple (LCM) of the denominators.

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) of two numbers is the smallest number that is a multiple of both numbers.

Front

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

Back

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

Front

Calculate: 3/4 - 1/2

Back

1/4

Front

Calculate: 3/20 + 3/4

Back

9/10

Front

Calculate: 2/10 + 1/5

Back

4/10

Front

Calculate: 1/6 + 1/12

Back

1/4