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: [321, -219, 13, 831, -561, -867, -779, -354, 796, -355, -817, -173, 235, -305, -505]

[320, -220, 10, 830, -560, -870, -780, -350, 800, -360, -820, -170, 240, -300, -500]