Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Sam has 16 blue and 25 green balloons. Alyssa has 21 blue balloons.How many blue balloons do they have in all?
Student:
37.0