TASK 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.
PROBLEM: [638, 820, 854, 284, 606, -769, 167, 215, 612, 581, -407, 726, -778, -382, 340]

SOLUTION: [640, 820, 850, 280, 610, -770, 170, 220, 610, 580, -410, 730, -780, -380, 340]

PROBLEM: [-712, 47, -909, 609, 729, -339]

SOLUTION: [-710, 50, -910, 610, 730, -340]

PROBLEM: [3, -509, 31, -458, 721, -104, -290]

SOLUTION:
[0, -510, 30, -460, 720, -100, -290]