Use the open number line and our lists of temperature extremes to make signed number operations and absolute value sensible. Students compare record high and low temps (integers) and use absolute value in order to always find the positive difference. Subtraction of negatives becomes obvious in this lesson.
Use the extreme cold weather to practice and understand integer subtraction.
How much did the temperature change in Boston?
It’s been a crazy winter of extremes through much of the United States. Here’s an article, from the February 17, 2016 Boston Globe Newspaper by Matt Rochereau, with the degree swing whited out. Have your students determine the temperature increase…