Fraction Operations: Adding and Subtracting Rational Expressions

The video tutorial covers the importance of fractions in real-world math, focusing on adding unlike fractions, reducing them, and converting between mixed numbers and improper fractions. It also explains techniques for multiplying and dividing fractions, emphasizing the keep-change-flip method for division.

Why is it important to learn about fractions in real-world math?

• Because they are easier to work with than decimals.

• Because they are always whole numbers.

• Because they are not used in real-world math.

• Because they are often used in real-world scenarios.

What is the first step in adding fractions with different denominators?

• Add the numerators directly.

• Find a common denominator.

• Subtract the denominators.

• Multiply the fractions.

When adding fractions, what should you do after finding a common denominator?

• Multiply the numerators.

• Add the denominators together.

• Subtract the numerators.

• Add the numerators together.

How do you convert a mixed number to an improper fraction?

• Add the whole number to the fraction.

• Subtract the numerator from the denominator.

• Multiply the whole number by the denominator and add the numerator.

• Divide the whole number by the fraction.

What is the result of converting 2 and 3/4 to an improper fraction?

• 8/4

• 9/4

• 11/4

• 7/4

What is the first step in multiplying fractions?

• Add the numerators.

• Subtract the denominators.

• Find a common denominator.

• Reduce if possible.

When multiplying fractions, what can you do to simplify the process?

• Subtract the fractions first.

• Find a common denominator.

• Cross-reduce any numerator with any denominator.

• Add the fractions first.

What is the result of multiplying 3/7 by 5/6 after cross-reducing?

• 15/42

• 10/21

• 3/14

• 5/14

What is the method called for dividing fractions?

• Flip-Change-Keep

• Multiply-Divide-Add

• Add-Subtract-Multiply

• Keep-Change-Flip

What is the result of dividing 1/2 by 5/3 using the keep-change-flip method?

• 1/6

• 3/10

• 5/6

• 2/5