Exploring the Least Common Denominator in Fractions

The video tutorial introduces the concept of denominators in fractions and explains how to find the least common denominator to add fractions with different denominators. It provides step-by-step instructions and examples to illustrate the process, emphasizing the importance of finding the least common multiple. The tutorial concludes by encouraging viewers to practice the concepts learned.

What is the denominator in a fraction?

• The number of fractions

• The bottom number in a fraction

• The top number in a fraction

• The sum of the fractions

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Why can't you add fractions with different denominators directly?

• Because the fractions are not simplified

• Because the fractions are not whole numbers

• Because the denominators are different

• Because the numerators are different

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is one simple way to find a common denominator?

• Add the numerators

• Subtract the numerators

• Multiply the denominators

• Divide the denominators

What is the least common denominator (LCD)?

• The smallest common multiple of the denominators

• The smallest common multiple of the numerators

• The largest common multiple of the numerators

• The largest common multiple of the denominators

How do you find the least common denominator?

• By adding the denominators

• By listing the multiples of each denominator and finding the smallest common multiple

• By dividing the denominators

• By subtracting the denominators

What should you do after finding the least common denominator?

• Multiply the fractions

• Change each fraction to have the same denominator

• Add the numerators directly

• Subtract the numerators directly

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the least common multiple of 6 and 15?

• 30

• 12

• 18

• 24

What is the result of adding 5/30 and 14/30?

• 19/15

• 19/60

• 19/45

• 19/30

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

What is the least common multiple of 8 and 12?

• 16

• 24

• 32

• 40

What is the result of adding 9/24 and 10/24?

• 19/36

• 19/24

• 19/12

• 19/48

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D