This video is a mastery check for adding fractions with unlike denominators. It includes instructions for solving four problems independently, followed by detailed solutions and explanations for each problem. The goal is to achieve at least three correct answers out of four. The video emphasizes finding common denominators and simplifying fractions.

What should you have ready before starting the mastery check?

• A calculator and a ruler

• Something to write on and something to write with

• A textbook and a notebook

• A computer and internet connection

What is the common denominator used in the first problem?

• 10

• 15

• 5

• 20

In the first problem, what is the sum of the fractions after finding a common denominator?

• 5/10

• 6/10

• 7/10

• 8/10

What is the least common denominator found for the second problem?

• 40

• 36

• 30

• 24

What is the sum of the fractions in the second problem after renaming?

• 31/36

• 30/36

• 28/36

• 29/36

What common denominator is used in the third problem?

• 18

• 16

• 14

• 12

What is the result of adding the fractions in the third problem?

• 15/14

• 12/14

• 13/14

• 14/14

What is the common denominator for the fourth problem?

• 45

• 40

• 30

• 35

What is the sum of the fractions in the fourth problem?

• 38/40

• 39/40

• 40/40

• 41/40

What is the goal for the number of correct answers in the mastery check?

• 4 out of 4

• 3 out of 4

• 2 out of 4

• 1 out of 4