Evaluating Expressions and Basic Operations

The video tutorial covers evaluating mathematical expressions by substituting variables with given values. It includes examples of addition, subtraction, multiplication, and exponentiation, emphasizing the order of operations. A word problem is also solved to demonstrate real-world application.

What is the first step in evaluating an expression?

• Substitute the given values for variables

• Add all numbers together

• Divide the expression by 2

• Multiply all variables

If m equals 4, what is the result of 3 + m?

• 6

• 5

• 8

• 7

In the expression z - m, if z is 9 and m is 4, what is the result?

• 6

• 5

• 4

• 3

What does the expression 12r mean when r is a variable?

• 12 divided by r

• 12 times r

• 12 minus r

• 12 plus r

Calculate the value of 12r when r is 1/6.

• 1

• 2

• 3

• 4

In the expression 4m - 2, what operation should be performed first?

• Addition

• Subtraction

• Multiplication

• Division

What is the result of 4m - 2 when m equals 4?

• 12

• 14

• 16

• 18

In the expression 60r - 4, what does 60r represent?

• 60 times r

• 60 minus r

• 60 plus r

• 60 divided by r

Calculate the value of 60r - 4 when r is 1/6.

• 4

• 6

• 8

• 10

What is the first step in solving 3r^2?

• Add 3 to r

• Subtract 3 from r

• Square r

• Multiply 3 by r