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: [-866, -841, -934, -255, 456, 815, 56, 21, -138, -941, 346]

[-870, -840, -930, -260, 460, 820, 60, 20, -140, -940, 350]