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: [855, -111, -601]

SOLUTION: [860, -110, -600]

PROBLEM: [756, 183, -713, -539, -515, 970]

SOLUTION: [760, 180, -710, -540, -520, 970]

PROBLEM: [-429, 397, 720, -835, 709, -584, -623, -621, -421]

SOLUTION:
[-430, 400, 720, -840, 710, -580, -620, -620, -420]