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: [-640, 652, -350, 991, 479, -692, 937, 867, -379, 646, 29]

[-640, 650, -350, 990, 480, -690, 940, 870, -380, 650, 30]