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.

A restaurant served 9 pizzas during lunch and 6 during dinner today.How many pizzas were served today?
15.0

Before December, customers buy 1346 ear muffs from the mall.During December, they buy 6444, and there are none. In all, howmany ear muffs do the customers buy?
7790.0

Sara grew 43 pumpkins, but the rabbits ate 23 pumpkins. How manypumpkins does Sara have?

20.0