Adding and Subtracting Fractions with Uncommon Denominators

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 with uncommon denominators?

Back

It means to find a common denominator before adding the fractions together.

Front

How do you find a common denominator for two fractions?

Back

You can find a common denominator by identifying the least common multiple (LCM) of the two denominators.

Front

What is the least common multiple (LCM)?

Back

The least common multiple is the smallest number that is a multiple of two or more numbers.

Front

1/2 + 1/4 = ?

Back

3/4

Front

1/2 + 1/5 = ?

Back

7/10

Front

1/2 - 1/4 = ?

Back

1/4

Front

What is a common denominator for 3/10 and 1/5?

Back

10

Front

2/3 + 1/2 = ?

Back

7/6

Front

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

Back

The first step is to find a common denominator.