Least Common Denominator (LCD) Practice

Front

What is the Least Common Denominator (LCD)?

Back

The Least Common Denominator (LCD) is the smallest multiple that is common to the denominators of two or more fractions.

Front

How do you find the LCD of (x+3) and (x+2)?

Back

The LCD is (x+3)(x+2).

Front

What is the LCD of (x+1)(x-5) and (x-3)?

Back

The LCD is (x+1)(x-5)(x-3).

Front

What is the LCD of 3x and 9x?

Back

The LCD is 9x.

Front

How do you find the LCD of (x+2)(x-2) and (x+1)?

Back

The LCD is (x+2)(x-2)(x+1).

Front

What is the LCD of 18, 6x, and 3xy?

Back

The LCD is 6xy.

Front

What is the first step in finding the LCD of multiple fractions?

Back

Factor each denominator into its prime factors.

Front

Why is it important to find the LCD when adding or subtracting fractions?

Back

Finding the LCD allows you to combine fractions by providing a common denominator.

Front

What is the relationship between the LCD and the individual denominators?

Back

The LCD must be a multiple of each individual denominator.

Front

How can you verify that you have found the correct LCD?

Back

Check that the LCD is divisible by each of the original denominators.