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: [290, -151, -503, 475, 276, 137, -739, -995, 232, 659, 842, -989, -662, 544, 510]

[290, -150, -500, 480, 280, 140, -740, -1000, 230, 660, 840, -990, -660, 540, 510]