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: [-347, -19, 635, -987, 50, -468, -764, -304, 120, -15, -840, 841, -457, -257, -733]

[-350, -20, 640, -990, 50, -470, -760, -300, 120, -20, -840, 840, -460, -260, -730]