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: [-388, -589, -749, -392, 649, 23, -959, -186, 948, -118, 700, 912, -23, -1000, 512]

[-390, -590, -750, -390, 650, 20, -960, -190, 950, -120, 700, 910, -20, -1000, 510]