Exploring Adding and Subtracting Rational Expressions

This video tutorial covers the process of adding and subtracting fractions with unlike denominators. It begins with an introduction to the concept, followed by detailed examples of both addition and subtraction. The tutorial also addresses complex fractions and the conversion of mixed numbers. Finally, it presents real-world application problems to reinforce the concepts learned.

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

• Convert mixed numbers to improper fractions

• Add the numerators directly

• Simplify the fractions

• Find the LCM of the denominators

Tags

CCSS.7.NS.A.1C

What does LCM stand for?

• Last Common Multiple

• Least Composite Multiple

• Lowest Common Multiplier

• Least Common Multiple

How do you use the LCM in fraction operations?

• As the new denominator

• To divide the original fractions

• To multiply the original fractions

• As the new numerator

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the result of adding 13/12 and 3/4?

• 22/12

• 11/6

• 1 and 5/6

• 2 and 1/6

Tags

CCSS.7.NS.A.1C

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

• Divide the numerator by the denominator

• Multiply the numerator by the denominator

• Subtract the denominator from the numerator

• Add the numerator to the denominator

In application problem 13, how many liters of juice does Jordan have?

• 3 and 1/24 liters

• 4 liters

• 4 and 1/24 liters

• 5 liters

Tags

CCSS.5.MD.B.2

What is needed to solve application problem 14?

• Division of fractions

• Addition of fractions

• Subtraction of fractions

• Multiplication of fractions

Tags

CCSS.7.EE.B.3

How many gallons of gas did Elijah use over the 2-day road trip?

• 21 gallons

• 21 and 17/36 gallons

• 20 and 19/36 gallons

• 22 gallons

Tags

CCSS.7.EE.B.3

What fraction of students are in sixth grade at Riverrun Middle School?

• 7/24

• 1/3

• 3/8

• 1/4

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

What is the final step in adding or subtracting fractions with unlike denominators?

• Add the denominators

• Convert to mixed numbers

• Find the LCM

• Simplify the fraction

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2