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: [-601, 438, 1000, -397, 543, -930, 603, 335, 321]

[-600, 440, 1000, -400, 540, -930, 600, 340, 320]