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: [-635, 717, -272, 812, 273, 604, 550, -398, 847, 80]

[-640, 720, -270, 810, 270, 600, 550, -400, 850, 80]