Question

Lauren woke up one morning and saw frost on the windows. It was -2°C outside. Later in the day, the frost melted. At 3 p.m. it was 9°C outside. Which expression represents the difference between the two temperatures?

Answer 1

9-(-2) or 9+2

Explanation:

To find the difference of something, subtract one value from the other. It become addition because two negatives make a positive