Understanding Fractions with Unlike Denominators

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

• Find a common denominator

• Add the numerators directly

• Subtract the denominators

• Multiply the numerators

How can you find a common denominator for two fractions?

• Subtract the denominators

• Add the numerators

• Multiply the numerators

• Multiply the denominators

In the example where the denominators are 6 and 5, what is the common denominator used?

• 15

• 11

• 30

• 60

When subtracting 5/8 and 3/7, what is the common denominator?

• 15

• 35

• 56

• 21

What is the result of subtracting 5/8 and 3/7 after finding a common denominator?

• 11/56

• 13/56

• 11/21

• 13/21

What is the least common denominator for 8/9 and 2/3?

• 9

• 27

• 3

• 18

Why is it beneficial to use the least common denominator?

• It eliminates the need for simplification

• It makes the fractions larger

• It makes the fractions smaller

• It changes the value of the fractions

What is the simplified form of 6/27?

• 2/9

• 1/3

• 3/9

• 2/3

If you use a common denominator that is not the least, what might you need to do?

• Multiply the fractions

• Simplify the final answer

• Add the fractions again

• Subtract the fractions again

What is the final answer when subtracting 8/9 and 2/3 using the least common denominator?

• 6/27

• 3/9

• 2/9

• 1/3