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: [259, -773, -167, 373, 550, -497, -23, 555, 746, 91, 167, 18, -422, -567, 518]

[260, -770, -170, 370, 550, -500, -20, 560, 750, 90, 170, 20, -420, -570, 520]