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: [-398, 599]

SOLUTION: [-400, 600]

PROBLEM: [-339, -544, 319, 656, -624, -669]

SOLUTION: [-340, -540, 320, 660, -620, -670]

PROBLEM: [-141, -39, -257, -455, 747, -864, -948, -903, -642, -480, 599, 531, 771, 527, 262]

SOLUTION:
[-140, -40, -260, -460, 750, -860, -950, -900, -640, -480, 600, 530, 770, 530, 260]