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: [489, -54, -831, 976, 849, 703, -895, -911, -325, 294, 456, -318, 530, -21, 21]

[490, -50, -830, 980, 850, 700, -900, -910, -320, 290, 460, -320, 530, -20, 20]