Negative Numbers Math Example 1

Follow the full solution, then compare it with the other examples linked below.

Example 1

easy
The temperature was −8°C-8°\text{C} in the morning and rose by 15°C15°\text{C} by noon. What was the noon temperature?

Solution

  1. 1
    Start at −8-8 and add 1515: −8+15-8 + 15.
  2. 2
    Since 15>815 > 8, the result is positive: 15−8=715 - 8 = 7.
  3. 3
    The noon temperature was 7°C7°\text{C}.

Answer

7°C7°\text{C}
Adding a positive number to a negative number is equivalent to finding the difference and taking the sign of the number with the greater absolute value. Real-world contexts like temperature make negative numbers concrete.

About Negative Numbers

Negative numbers are numbers less than zero, used to represent direction, deficit, or values below a reference point.

Learn more about Negative Numbers →

More Negative Numbers Examples

Example 2 medium

Evaluate [formula].

Example 3 easy

Evaluate [formula].

Example 4 easy

A submarine is at [formula] meters. It rises [formula] meters and then sinks [formula] meters. What

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