5.2.4 Determining if a Value is Positive or Negative
Let’s try one last exercise, now that you are an expert!
Activity: Positive or Negative?
Determine if each number in the given situation is negative or positive.
- 3 degrees below zero.
- 52 m below sea level.
- $1000 net gain.
- $5000 withdrawal from ATM machine.
- $1000 deposit in savings account.
- 3 kg weight loss.
- 2 kg weight gain.
- 80 m above sea level.
- 37 above zero.
- $2000 net loss.
Look for key words, like “below”, “above”, or “loss” and “gain.”
The correct solutions have been sorted into a table below.
|3 degrees below zero||−3°|
|52 m below sea level||−52 m|
|$1000 net gain||$1000|
|$5000 withdrawal from ATM machine||−$5000|
|$1000 deposit in savings account||$1000|
|3 kg weight loss||−3 kg|
|2 kg weight gain||2 kg|
|80 m above sea level||80 m|
|37 above zero||37°|
|$2000 net loss||−$2000|
Now that we have looked at some examples of negative numbers and you have learnt how to represent them on a number line, we will move on to using negative numbers in calculations.