Fraction Operations and LCM Concepts

In this video, Mr. J explains how to add three fractions by finding a common denominator, renaming the fractions, adding them, and simplifying the result if necessary. Two example problems are solved step-by-step, demonstrating the process of listing multiples to find the least common denominator, renaming fractions with this denominator, and converting improper fractions to mixed numbers.

What is the first step in adding three fractions?

• Find a common numerator

• Find a common denominator

• Multiply the fractions

• Subtract the fractions

What is the least common multiple (LCM) of 5, 3, and 15?

• 45

• 10

• 15

• 30

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

How do you rename the fraction 2/5 with a denominator of 15?

• 10/15

• 2/15

• 5/15

• 6/15

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the sum of 6/15, 10/15, and 3/15?

• 20/15

• 19/15

• 21/15

• 18/15

What is the least common multiple (LCM) of 8, 3, and 6?

• 18

• 30

• 24

• 12

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

How do you rename the fraction 7/8 with a denominator of 24?

• 28/24

• 7/24

• 21/24

• 14/24

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is the equivalent fraction of 1/3 with a denominator of 24?

• 6/24

• 12/24

• 4/24

• 8/24

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the sum of 21/24, 8/24, and 20/24?

• 51/24

• 48/24

• 49/24

• 50/24

How do you convert the improper fraction 49/24 to a mixed number?

• 3 and 1/24

• 2 and 2/24

• 2 and 1/24

• 1 and 1/24

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What are the steps to add three fractions?

• Subtract, rename, add, simplify

• Multiply, rename, add, simplify

• Find common denominator, rename, add, simplify

• Find common numerator, rename, add, simplify

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D