Create Common Denominators: Finding the Least Common Multiple

This lesson teaches how to create common denominators between fractions using equations. It explains the components of fractions, such as numerators and denominators, and introduces the concept of equivalence. The lesson covers finding common multiples and least common multiples to make denominators equal. It provides a step-by-step approach to equating denominators by applying the same operations to both numerators and denominators, ensuring the fractions remain equivalent.

What is the role of the numerator in a fraction?

• It is the number below the line in a fraction.

• It is always equal to the denominator.

• It represents the total number of parts.

• It shows the part of the whole being considered.

What does it mean for fractions to have common denominators?

• The numerators are the same.

• The fractions are equivalent.

• The fractions are improper.

• The denominators are the same.

How do you find the least common multiple (LCM) of two numbers?

• By subtracting the smaller number from the larger one.

• By finding the smallest number that both numbers divide into.

• By adding the two numbers together.

• By multiplying the two numbers.

In the example of 2/3 and 2/5, what is the least common multiple of the denominators?

• 30

• 15

• 20

• 10

What must be done to the numerator when adjusting the denominator to find a common denominator?

• Divide it by the same factor used for the denominator.

• Add the same factor used for the denominator.

• Subtract the same factor used for the denominator.

• Multiply it by the same factor used for the denominator.