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: [-673, -787, 728, 788, -954, -535, -211, -378, -224, 320, 644, 518]

[-670, -790, 730, 790, -950, -540, -210, -380, -220, 320, 640, 520]