25. Directed Numbers Talk About


1. a) What instrument is in the picture and what do we use it to measure? b) What temperature does the thermometer read? c) Is this a warm or a cool temperature?


2. Fill in this definition: The freezing point of water is at is at 100°C.


°C and the point of water


3. Sort the following list into temperatures above freezing point and temperatures below freezing point.


+8°C –5°C –9°C +2°C +10°C –3°C 0°C


4. Draw a thermometer with a scale reading from 10°C to –10°C and decide which is the warmer temperature?


a) 4°C or 12°C b) 6°C or 2°C c) 1°C or –6°C d) –2°C or –9°C


5. Which is the colder temperature? Use the thermometer you drew for questions 4 to help you.


a) 6°C or 5° C b) 0°C or 8°C c) –1°C or –10°C d) 0°C or –7°C


6. Pick 5 European capital cities and find their midday temperature today. Put the cities in order of temperature from the warmest to the coolest.


7. In a lift, what number would indicate: a) 2 floors above ground level b) 2 floors below ground level


8. A golfer scored 75 on a golf course that had a par of 72. Was the golfer’s score +3, or 3 over par, or was her score –3, or 3 under par?


Strand: Algebra


Curriculum Objectives: Identify positive and negative numbers on the number line; add simple positive and negative numbers on the number line.


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