This activity is about moving along a temperature scale, starting at a negative number, and moving to the right if the temperature rises, and to the left if it falls.
Work out the temperature as it rises or falls.
A temperature is -4°C. What will it be if it rises 5°C?
Look at this number line.
Start at -4 and move 5 units to the right. You will get to 1.
So -4°C + 5°C = 1°C
Let's try some questions on this.