Add and Subtract Fractions

Front

What is a fraction?

Back

A fraction represents a part of a whole, consisting of a numerator (top number) and a denominator (bottom number).

Front

What is the numerator in a fraction?

Back

The numerator is the top number in a fraction that indicates how many parts of the whole are being considered.

Front

What is the denominator in a fraction?

Back

The denominator is the bottom number in a fraction that indicates the total number of equal parts the whole is divided into.

Front

What does it mean to add fractions?

Back

To add fractions, you combine 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

To subtract fractions, you take away the parts represented by one fraction from another. If the denominators are the same, subtract the numerators. If they are different, find a common denominator first.

Front

What is a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions, allowing them to be added or subtracted.

Front

How do you find the least common denominator (LCD) for two fractions?

Back

To find the least common denominator, list the multiples of each denominator and identify the smallest multiple they share.

Front

What is the least common denominator for 3 and 4?

Back

12

Front

What is the least common denominator for 7 and 2?

Back

14

Front

How do you add 1/4 and 1/2?

Back

Convert 1/2 to 2/4, then add: 1/4 + 2/4 = 3/4.