Add and Subtract positive and negative numbers
1.
In an experiment Rashid measures the temperature of two liquids.
The temperature of the first liquid is -11oC.
The temperature of the second liquid is 23oC.
Find the difference between these temperatures.
2.
The circle below contains seven numbers.
Find the three numbers from the circle which add up to -10.
You must show your working.
3.
In July the average temperature in Anchorage, Alaska
is 9oC.
By January the average temperature has fallen by
26oC.
What is the average temperature in Anchorage in
January?
4.
One day last February, Anna compared the
temperature in Edinburgh with the temperature in
Montreal.
The temperature in Edinburgh was 8oC.
The temperature in Montreal was -15oC.
Find the difference between these temperatures.
5.
Tom compared the temperatures in the Sahara Desert and at the North Pole.
The temperature in the Sahara Desert was 32oC.
The temperature at the North Pole was 46oC less than the temperature in the Sahara
Desert.
What was the temperature at the North Pole?
6.
The temperature in Aberdeen one morning is 2oC. During the day the
temperature rises by 9 degrees.
What is the temperature now?
7.
Yesterday Frank’s bank balance was £215. Today it is – £47.
How much has Frank spent?
8.
Freezers operate at different temperatures depending on their star ratings.
A 1 star freezer operates at – 6oC and a 2 star at – 12oC.
What is the difference in the operating temperatures of these two freezers?