Adding & Subtracting Fractions with UNLIKE Denominators

Front

What is the first step when adding or subtracting fractions with unlike denominators?

Back

Find a common denominator.

Front

Can you add fractions with unlike denominators directly?

Back

No, you cannot add unlike denominators directly.

Front

What is a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions.

Front

How do you find a common denominator for 1/4 and 1/6?

Back

The least common multiple (LCM) of 4 and 6 is 12, so the common denominator is 12.

Front

What is the process to add 1/4 and 1/6?

Back

Convert both fractions to have a common denominator, then add the numerators.

Front

What is the result of adding 1/4 and 1/6?

Back

The result is 5/12.

Front

When subtracting fractions with unlike denominators, what must you do first?

Back

Find a common denominator before subtracting.

Front

If you have 2/3 and 1/4, what is the common denominator?

Back

The common denominator is 12.

Front

How do you convert 2/3 to a fraction with a denominator of 12?

Back

Multiply the numerator and denominator by 4 to get 8/12.

Front

What is the sum of 5/9 and 1/6?

Back

The sum is 13/18.