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: [279, -668, 264, 430, 398, 112, -824, -30, 225, -320, 702, 16, -835]

[280, -670, 260, 430, 400, 110, -820, -30, 220, -320, 700, 20, -840]