Adding and Subtracting Fractions

Front

What is a fraction?

Back

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

Front

What does the numerator in a fraction represent?

Back

The numerator is the top number of a fraction and represents how many parts we have.

Front

What does the denominator in a fraction represent?

Back

The denominator is the bottom number of a fraction and represents the total number of equal parts in a whole.

Front

How do you add fractions with the same denominator?

Back

To add fractions with the same denominator, keep the denominator the same and add the numerators. For example, 1/4 + 2/4 = (1+2)/4 = 3/4.

Front

How do you subtract fractions with the same denominator?

Back

To subtract fractions with the same denominator, keep the denominator the same and subtract the numerators. For example, 3/5 - 1/5 = (3-1)/5 = 2/5.

Front

What do you do when adding fractions with different denominators?

Back

When adding fractions with different denominators, first find a common denominator, convert the fractions, and then add them.

Front

What is a common denominator?

Back

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

Front

How do you find a common denominator for 1/3 and 1/4?

Back

The least common multiple of 3 and 4 is 12. So, the common denominator is 12.

Front

Convert 1/3 to a fraction with a denominator of 12.

Back

1/3 = 4/12 (multiply the numerator and denominator by 4).

Front

Convert 1/4 to a fraction with a denominator of 12.

Back

1/4 = 3/12 (multiply the numerator and denominator by 3).