You are provided with an arithmetic question. Your task is to compute the solution using the given arithmetic operations. The only arithmetic operators needed to answer the questions are'+'(addition) and'-'(subtraction). The answer should be correct to one decimal place.

There are 48 pencils and 40 scissors in the drawer. Joan placed 29pencils in the drawer. How many pencils are now there in all?
77.0

Tim found 679 seashells and 110 starfish on the beach. He gave 172of the seashells to Sara. How many seashells does Tim now have?
507.0

Tori was 4.4 feet tall. Then she grew 2.8 feet taller. How tall is Tori now?

7.2