Using Rational Numbers in the Real World

The video tutorial explains how to solve a math problem involving temperature changes over time. It breaks down the problem into steps, calculating decreases and increases in temperature, and finally determining the total change. The tutorial emphasizes understanding the problem, performing calculations, and applying rules for adding integers with different signs.

What is the initial temperature change that occurs in the evening?

• A decrease of 2 degrees

• A decrease of 5 degrees

• An increase of 5 degrees

• An increase of 2 degrees

How many degrees does the temperature decrease each hour for the next 7 hours?

• 1 degree

• 2 degrees

• 3 degrees

• 4 degrees

What is the total temperature decrease after the first 8 hours?

• 21 degrees

• 14 degrees

• 19 degrees

• 16 degrees

By how many degrees does the temperature increase the next morning?

• 11 degrees

• 14.5 degrees

• 10 degrees

• 12.5 degrees

What is the overall change in temperature by the end of the day?

• A decrease of 5.5 degrees

• An increase of 5.5 degrees

• A decrease of 6.5 degrees

• An increase of 6.5 degrees