npv y4 negative

What you'll learn

1. 1

   Imagine a thermometer outside your window. When it's very cold, the red line goes below 0!

2. 2

   What sign do negative numbers have in front of them?

3. 3

   Drag the thermometer to show -5°C. That's 5 degrees below zero.

4. 4

   The temperature is 3°C. It drops by 4 degrees. Where is it now?

5. 5

   Set the thermometer to -8°C. That's even colder!

6. 6

   Which number is colder: -2°C or 1°C?

7. 7

   The temperature goes from 0°C down to -6°C. How many degrees did it drop?