How to find common multiples of fractions - free online tutoring

The video tutorial explains how to find common denominators for fractions by identifying common multiples. It demonstrates two methods: listing multiples and multiplying denominators. The importance of finding the lowest common multiple is emphasized to simplify fractions effectively. The tutorial provides step-by-step examples to illustrate these concepts, ensuring a clear understanding of how to add and subtract fractions with different denominators.

What is the first step in finding a common denominator for adding fractions?

• Add the denominators directly

• List the multiples of each denominator

• Subtract the smaller denominator from the larger one

• Multiply the numerators together

How do you adjust a fraction to have a common denominator?

• Add the same number to both the numerator and denominator

• Multiply both the numerator and denominator by the same number

• Subtract the numerator from the denominator

• Divide the numerator by the denominator

When using the alternative method, what is a potential drawback?

• It always results in an incorrect answer

• It requires more complex calculations

• It only works for even numbers

• It may require reducing the resulting fraction

Why is it important to find the lowest common multiple when working with fractions?

• To ensure the fractions are in their simplest form

• To increase the size of the fractions

• To make the calculation process longer

• To avoid using multiplication

What is the lowest common multiple of 4 and 6?

• 6

• 18

• 12

• 24