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: [511, -986, 266, 160, -67, -434, -850, -307, 660, 74, -312, 658, -682, -825, -345]

[510, -990, 270, 160, -70, -430, -850, -310, 660, 70, -310, 660, -680, -820, -340]