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: [-664, 484, 126, 437, 644, -478, 844, 880, -788, -312, 686, -979, 659]

[-660, 480, 130, 440, 640, -480, 840, 880, -790, -310, 690, -980, 660]