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Calculation Task (Intermediate) 3


Complete the following calculations without a calculator:

a) Calculate the mean of the following: 15, 7, 12, 3, 8 =

​b) (45 + 35) – (43 + 12) = 

Answers

a) Calculate the mean of the following: 15, 7, 12, 3, 8 = 9
​
b) (45 + 35) – (43 + 12) = 25