TASK DEFINITION: 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.
PROBLEM: Dan had 7 potatoes and 4 cantelopes in the garden. The rabbits ate 4of the potatoes. How many potatoes does Dan now have?

SOLUTION: 3.0

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

SOLUTION: 15.0

PROBLEM: Jason grew 37 watermelons and 30 pumpkins. Sandy grew 11watermelons. How many watermelons did they grow in total?

SOLUTION:
48.0