Evaluating Numerical Expressions with Order of Operations

The video tutorial introduces the concept of order of operations in mathematics, using a back-to-school shopping scenario to illustrate how to calculate total costs with discounts and gift certificates. The instructor, Jeff Jacobson, explains the PEMDAS rule (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction) to ensure consistent results in mathematical expressions. The video includes step-by-step examples to demonstrate the application of these rules, emphasizing the importance of following the correct order to avoid errors.

How much did each t-shirt cost after the discount?

• $3

• $15

• $9

• $12

What was the total cost of the pants?

• $120

• $160

• $80

• $40

What is the first step in the order of operations?

• Addition

• Parentheses

• Multiplication

• Exponents

What does the acronym PEMDAS stand for?

• Parentheses, Exponents, Division, Multiplication, Subtraction, Addition

• Parentheses, Exponents, Multiplication, Division, Addition, Subtraction

• Parentheses, Exponents, Multiplication, Division, Subtraction, Addition

• Parentheses, Exponents, Division, Multiplication, Addition, Subtraction

What is the result of 12 minus 3?

• 6

• 3

• 9

• 15

What is the value of 5 times 9?

• 50

• 35

• 40

• 45

What is the final total after applying the gift certificate?

• $165

• $50

• $120

• $115

What is 2 cubed?

• 10

• 8

• 6

• 4

What is the result of 30 divided by 15?

• 2

• 3

• 4

• 1

What does it mean when a number is next to parentheses?

• Addition

• Division

• Subtraction

• Multiplication