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? If you are still confused, see the following example:
Joan found 70 seashells on the beach. She gave Sam some of her seashells, after which she has 27 seashell left. How many seashells did she give to Sam?
Solution: 43.0
Reason: The total number of seashells found by Joan is 70. Since she now has 27 seashells left, it implies that she gave 70-27 = 43 seashells to Sam. Hence the correct answer till 1st decimal place is 43.0.

Now, solve this instance: 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?
Student:
100.0