Solving One-Step Addition and Subtraction Equations

This video tutorial covers lesson 6.2b, focusing on writing and solving one-step addition and subtraction equations. It explains the use of negative numbers in real-world situations, such as elevations below sea level. The lesson includes practical examples like a scuba diver's elevation change, a fish swimming upward, Tala's checking account balance, and Sam's descent. Each example demonstrates how to use inverse operations to solve equations. The tutorial concludes with a transition to the next lesson on multiplication and division problems.

What does a negative number represent in terms of elevation?

• None of the above

• At sea level

• Below sea level

• Above sea level

If a scuba diver moves from -11.5 feet to -5.35 feet, what is the vertical distance traveled?

• 6.15 feet

• 5.35 feet

• 16.85 feet

• 11.5 feet

A fish swims from -60 feet to -20 feet. What is the vertical distance it swam?

• 20 feet

• 80 feet

• 40 feet

• 60 feet

What operation is used to isolate a variable in an equation?

• Multiplication

• Division

• Inverse operation

• Exponentiation

If Tala writes a check for $38.50 and her account is overdrawn by $15.25, how much was in her account before?

• $15.25

• $53.75

• $38.50

• $23.25

What does it mean if an account is overdrawn?

• Positive balance

• Zero balance

• Negative balance

• None of the above

Sam descended 15.4 meters to an elevation of 20.1 meters. What was his initial elevation?

• 4.7 meters

• 35.5 meters

• 20.1 meters

• 15.4 meters

What is the inverse operation of subtraction?

• Division

• Multiplication

• Addition

• Subtraction

If you have a positive number and you want to isolate a variable, what should you do?

• Divide both sides by the same number

• Multiply both sides by the same number

• Subtract the same number from both sides

• Add the same number to both sides

What is the result of adding a number to its negative counterpart?

• Zero

• A negative number

• A positive number

• The same number