What is the sum of all integers located on the coordinate line between the numbers -13.8 and 17.6?

First, let’s write down all the integers that are located on the coordinate line between the numbers – 13.8 and 17.6:

– 13, – 12, – 11, – 10, – 9, – 8, – 7, – 6, – 5, – 4, – 3, – 2, – 1, 0, 1, 2, 3, 4, 5 , 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 and 17.

Secondly, let’s pay attention to the fact that most of the series consists of opposite numbers, the sum of which is 0 (- 13 + 13 = 0, – 12 + 12 = 0, etc.). Therefore, the sum of all numbers is:

S = (- 13 + … + 13) + 14 + 15 + 16 + 17 = 0 + 62 = 62.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.