Basic Arithmetic Operations and Expressions

The video tutorial explains how to set variables and evaluate mathematical expressions using these variables. It begins with a simple example involving variables a and b, demonstrating multiplication and subtraction while emphasizing the order of operations. The tutorial then progresses to a more complex expression involving variables x, y, and z, showcasing the importance of correctly substituting values and following the order of operations to arrive at the correct result.

If a is set to 5 and b is set to 7, what is the result of a * b - 3?

• 30

• 28

• 35

• 32

What is the first step in evaluating the expression 5 * 7 - 3?

• Add 5 and 7

• Subtract 3 from 7

• Divide 7 by 5

• Multiply 5 by 7

What is the value of 5 * 7?

• 32

• 30

• 28

• 35

If x is -1, y is 2, and z is 4, what is the expression x * y + z * y^2 - x + 1?

• 16

• 13

• 15

• 14

What is the value of y squared if y is 2?

• 2

• 4

• 6

• 8

What is the result of multiplying z by y squared when z is 4 and y is 2?

• 8

• 20

• 12

• 16

What happens when you subtract a negative number?

• It stays the same

• It becomes positive

• It becomes more negative

• It becomes zero

What is the final result of the expression -1 * 2 + 4 * 2^2 - (-1) + 1?

• 14

• 15

• 16

• 17

What is the result of -1 * 2?

• -2

• 0

• 2

• 1

What is the value of 4 * 4?

• 18

• 16

• 14

• 12