Milk, chocolate and sugar

This task is about adding fractions with different denominators.
milk carton

a)  Cameron had 34 of a cup of milk and Anika had 12 of a cup.

     How many cups of milk did they have altogether? _____

chocolate chips

b)  Cameron had 16 of a cup of chocolate chips and Anika had 23 of a cup.

     How many cups of chocolate chips did they have altogether? _____

bag of sugar

c)  Cameron had 15 of a cup of sugar and Anika had 23 of a cup.

     How many cups of sugar did they have altogether? _____