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, you add the numerators. If they are different, you need a common denominator.

Front

What does it mean to subtract fractions?

Back

Subtracting fractions involves taking one fraction away from another. Like addition, if the denominators are the same, you 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)?

Back

The least common denominator (LCD) is the smallest multiple that two or more denominators share. You can find it by listing the multiples or using the prime factorization method.

Front

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

Back

The first step is to find the least common denominator (LCD) for the fractions.

Front

Solve: 3/4 - 1/2

Back

1/4

Front

Solve: 4/5 - 1/20

Back

15/20

Front

Can you add fractions with different denominators directly?

Back

No, you cannot add fractions with different denominators directly; you must first find a common denominator.

Front

Solve: 8/9 - 5/6

Back

1/18