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: [-159, 266, 744, -278, -417, -136, 15, 631, -756, 618, -417, 762]

[-160, 270, 740, -280, -420, -140, 20, 630, -760, 620, -420, 760]