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: [521, 917, -666, -480, 256, 418, -401, -590, -409, 314, -33, 505]

[520, 920, -670, -480, 260, 420, -400, -590, -410, 310, -30, 500]