Fractions and Cake Consumption

The video tutorial explains how to determine the fraction of a cake eaten by Karen and Jerome using two methods: modeling with rectangles and using common denominators. It demonstrates how to partition the cake into equal pieces to visualize the fractions and then solve the problem mathematically by finding a common denominator. The tutorial concludes with a summary of the results, showing that 17/20 of the cake was eaten and 3/20 is left.

What fraction of the cake did Karen eat at the party?

• 1/4

• 3/4

• 3/5

• 1/5

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

How many pieces of the cake did Jerome eat?

• 1/5

• 2/5

• 1/4

• 3/5

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

When modeling the fractions, how many equal pieces was the cake divided into?

• 25

• 20

• 10

• 15

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is the equivalent fraction of 1/4 when converted to a denominator of 20?

• 6/20

• 7/20

• 5/20

• 4/20

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

What is the equivalent fraction of 3/5 when converted to a denominator of 20?

• 13/20

• 10/20

• 12/20

• 11/20

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the total fraction of the cake that was eaten?

• 15/20

• 17/20

• 18/20

• 16/20

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the fraction of the cake that is left after Karen and Jerome ate?

• 4/20

• 3/20

• 2/20

• 5/20

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

How do you write the whole cake as a fraction with a denominator of 20?

• 18/20

• 19/20

• 21/20

• 20/20

Tags

CCSS.7.NS.A.3

What operation is used to find the remaining fraction of the cake?

• Division

• Multiplication

• Subtraction

• Addition

What is the least common multiple of 4 and 5?

• 30

• 25

• 20

• 15