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: [904, -803, 700, -403, 709, 298, -979, -385, -685, -263, -229, 222, -338, 387, -142]

[900, -800, 700, -400, 710, 300, -980, -380, -680, -260, -230, 220, -340, 390, -140]