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: [136, -271, 305, -192, -859, 791, -829, 50, 842, -421, 877, -420, -439, -153]

[140, -270, 300, -190, -860, 790, -830, 50, 840, -420, 880, -420, -440, -150]