This action is called finding a mean. This is used in finding the Statistics. The Mean is the numbers added together, then divided by the number of numbers shown. For instance, I need to find the middle of 67 and 70. What I do, is I add the two numbers together which equals, 137. We divide 137 by how much numbers there are, which would be two numbers, because 67 is one number, and 70 is another number. This combined would equal two numbers. The Final answer would be 137/2, which would equal 68.5. Same with your question, 88+81=169. 169/2=84.5
Answer=84.5
