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: [405, -789, 297, -521, 339, -363, -738, -873, -10, 776, -292, 967, 508]

[400, -790, 300, -520, 340, -360, -740, -870, -10, 780, -290, 970, 510]