Fractions and Age Calculations

Shelagh and Luana use fractions to express their ages for precise calculation. Shelagh is 15 1/2 years old, and Luana is 7 7/12 years old. The video demonstrates converting these ages to improper fractions, finding a common denominator, subtracting to find the age difference, and simplifying the result to a mixed number. The final difference is 7 11/12 years.

Why do Shelagh and Luana decide to use fractions to express their ages?

• To calculate the difference in their ages more precisely

• To make it easier to remember their ages

• To make their ages sound more interesting

• To confuse their friends

Tags

CCSS.3.NF.A.3C

What is Shelagh's age expressed as an improper fraction?

• 30/2

• 32/2

• 31/2

• 15/2

What is Luana's age expressed as an improper fraction?

• 91/12

• 90/12

• 92/12

• 89/12

What is the least common multiple of the denominators 2 and 12?

• 24

• 18

• 6

• 12

Tags

CCSS.4.NBT.B.5

What is the result of multiplying 31 by 6?

• 186

• 180

• 190

• 176

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What is the result of subtracting 91 from 186?

• 95

• 96

• 94

• 97

Tags

CCSS.4.NBT.B.6

How many times does 12 go into 95?

• 8

• 6

• 5

• 7

Tags

CCSS.4.NBT.B.6

What is the remainder when 95 is divided by 12?

• 10

• 12

• 11

• 9

What is the simplified mixed number form of 95/12?

• 7 and 9/12

• 7 and 10/12

• 8 and 1/12

• 7 and 11/12

Tags

CCSS.7.NS.A.1C

How much older is Shelagh than Luana?

• 8 years

• 6 and 11/12 years

• 7 and 10/12 years

• 7 and 11/12 years

Tags

CCSS.7.NS.A.1C