Evaluating Expressions with Negative Numbers

This video tutorial covers the evaluation of mathematical expressions by substituting values for variables and applying the order of operations. The instructor emphasizes the importance of using parentheses when dealing with negative numbers and provides several examples to illustrate the process. The tutorial builds on previous lessons about the order of operations, adding complexity by introducing variable substitution. The video concludes with a series of examples that demonstrate how to handle complex expressions involving multiple operations and negative numbers.

What is the most important step when substituting negative numbers into expressions?

• Multiplying the numbers first

• Adding the numbers first

• Using parentheses

• Ignoring the negative sign

When substituting a variable with a value, what does '2A' mean if A equals 2?

• 2 divided by 2

• 2 times 2

• 2 plus 2

• 22

How do you evaluate the expression B squared minus E squared if B is -3 and E is 6?

• 9 minus 36

• 36 minus 9

• -9 minus 36

• 9 plus 36

What is the result of the expression negative 3C minus (A plus D) plus F if C is 4, A is 2, D is -5, and F is -7?

• -16

• -7

• -11

• -9

In the expression 2 times B minus E plus (F plus C) squared, what is the result if B is -3, E is 6, F is -7, and C is 4?

• 9

• -18

• -9

• 18

What is the simplified result of D minus C divided by 3 if D is -5 and C is 4?

• -9

• 3

• -3

• 9

How do you handle double signs in expressions like 'plus negative seven'?

• Ignore them

• Leave as is

• Convert to plus

• Convert to minus

What is the result of the expression C times (A times B minus 1) plus D times E minus F squared if C is 4, A is 2, B is -3, D is -5, E is 6, and F is -7?

• -107

• 107

• -49

• 49

What is the result of multiplying negative 4 by negative thirteen?

• -52

• 52

• -13

• 13

What is the final result of the expression negative 28 minus 30 minus 49?

• -107

• -58

• -49

• -28