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: [-20, 608, 985, -101, -998, -166, 820, 709, -577, 306, -421]

[-20, 610, 980, -100, -1000, -170, 820, 710, -580, 310, -420]