Add and Subtract Unlike Fractions

Front

What is an unlike fraction?

Back

Unlike fractions are fractions that have different denominators.

Front

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

Back

To find the least common denominator, identify the least common multiple (LCM) of the denominators of the fractions.

Front

What is the first step in adding unlike fractions?

Back

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

Front

How do you convert fractions to have a common denominator?

Back

Multiply the numerator and denominator of each fraction by the necessary factor to make the denominators equal to the least common denominator.

Front

What is the formula for adding two fractions?

Back

The formula for adding two fractions a/b and c/d is (a*d + b*c) / (b*d).

Front

What is the formula for subtracting two fractions?

Back

The formula for subtracting two fractions a/b and c/d is (a*d - b*c) / (b*d).

Front

What is the result of 3/5 + 1/4?

Back

The result is 17/20.

Front

What is the least common denominator for 1/3 and 3/4?

Back

The least common denominator is 12.

Front

What is the result of 8/9 - 1/3?

Back

The result is 5/9.

Front

What is the least common denominator for 6/7 and 1/2?

Back

The least common denominator is 14.