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: [-280, 857, -809, -160, -987, 362, 468, -237, 958, 84, 390, -660]

[-280, 860, -810, -160, -990, 360, 470, -240, 960, 80, 390, -660]