Adding and subtracting fractions

This task is about addition and subtraction of fractions.

a)
 
In a team race, Kylie ran \(1 \over 4\) of a kilometre and then tagged Joshua who ran for \(1 \over 8\) of a kilometre.
 
Altogether, what fraction of a kilometre had they run? __________
 

 
 
 
b)
Marie and Liam shared a pie. Marie ate \(1 \over 3\) of the pie and Liam ate \(1 \over 5\) of the pie.
What fraction of the pie
 
 

i)
 
ii)

 

... did they eat altogether? __________
 
... was left over? __________
 
 
 
c)
 
Wiremu had \(3 \over 7\) kilogram of cheese. He was given another \(2 \over 5\) kilogram.
 
What fraction of a kilogram of cheese did Wiremu now have? __________