Find Amount of Change with Rational Numbers

The video tutorial discusses solving a real-world math problem involving temperature changes over time. It begins with a problem statement about temperature fluctuations over a day and guides viewers through calculating the total change. The tutorial explains how to handle positive and negative values, emphasizing the importance of understanding signed numbers. The solution reveals that the temperature increased by 6.5 degrees Fahrenheit. The video concludes with a review of the concepts covered, including adding numbers with like and unlike signs.

What was the initial temperature change during the first hour after sunset?

• Increased by 5 degrees

• Decreased by 2 degrees

• Increased by 2 degrees

• Decreased by 5 degrees

How many degrees did the temperature decrease over the next 7 hours after the first hour?

• 2 degrees

• 5 degrees

• 7 degrees

• 14 degrees

By how much did the temperature increase the next morning?

• 5 degrees

• 2 degrees

• 14.5 degrees

• 11 degrees

What is the total decrease in temperature before any increase?

• 5 degrees

• 14 degrees

• 11 degrees

• 19 degrees

What is the total increase in temperature after the decreases?

• 14.5 degrees

• 11 degrees

• 19 degrees

• 25.5 degrees

What is the net change in temperature after all increases and decreases?

• 19 degrees increase

• 25.5 degrees decrease

• 6.5 degrees increase

• 6.5 degrees decrease

What is the method used to find the net change in temperature?

• Divide the total change by the number of hours

• Multiply all changes together

• Subtract all positive changes from negative changes

• Add all positive changes and subtract all negative changes