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: [668, 480, 358, 668, 465, 854, 789, -453, 126, -258, 783, -707, -511, 294, 609]

[670, 480, 360, 670, 460, 850, 790, -450, 130, -260, 780, -710, -510, 290, 610]