Fractions and Common Denominators

The video tutorial explains how to add rational numbers, commonly known as fractions. It covers adding fractions with the same and different denominators, finding a common denominator, and solving a word problem involving fractions and tax. The tutorial provides step-by-step examples to illustrate these concepts.

What is the sum of 3/7 and 2/7?

• 6/7

• 5/7

• 7/7

• 1/7

To add 5/16 and 5/12, what is the least common multiple of the denominators?

• 72

• 60

• 48

• 32

What is the sum of 5/16 and 5/12 when expressed with a common denominator?

• 30/48

• 25/48

• 35/48

• 40/48

What is the sum of 8/25 and 7/10 when expressed with a common denominator?

• 31/50

• 21/50

• 41/50

• 51/50

What is the least common multiple of 15 and 9?

• 30

• 45

• 60

• 75

What is the sum of 7/15 and 2/9 when expressed with a common denominator?

• 41/45

• 51/45

• 21/45

• 31/45

Nadia contributes 1/2 of the cost of ice cream. What fraction does Ian contribute?

• 1/5

• 1/2

• 1/3

• 1/4

Peter contributes 1/4 of the cost of ice cream. What is the total fraction contributed by Nadia, Ian, and Peter?

• 1 1/4

• 1 1/12

• 1 1/3

• 1

What is the least common multiple of 2, 3, and 4?

• 10

• 8

• 12

• 6

What fraction of the cost of ice cream was added as tax?

• 1/11

• 1/13

• 1/10

• 1/12