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: [818, -800, 432, 787, -500, -487, -21, 997, 723, -266, -756]

[820, -800, 430, 790, -500, -490, -20, 1000, 720, -270, -760]