Definition: In this task you will be given a list of integers. You should round each integer to the nearest tens place. That means you should round the number to the nearest multiple of 10.
Input: [-279, 319, 96, 915, 4, 602, -257, 400, -983, -786, -988]

[-280, 320, 100, 920, 0, 600, -260, 400, -980, -790, -990]