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.
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Question: This afternoon Craig left school, rode the bus 3.8 miles, and then walked 0.2 mile to get home. How much farther did Craig ride than walk?

Answer: 3.6


Question: Mary found 45 seashells, Melanie found 23 seashells, and Jasonfound 32 seashells on the beach. When they cleaned them, theydiscovered that 31 were cracked. How many seashells did they findtogether?

Answer: 100.0


Question: Joan grew 8 watermelons and 4 turnips. Tom grew 9 watermelons.How many watermelons did they grow in total?

Answer:
17.0