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: [-337, -489, -16, 662, 863, 490, 250, 944, 956, -838]

[-340, -490, -20, 660, 860, 490, 250, 940, 960, -840]