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: [689, -12, 956, -860, 562, -558, -390, 518, -974, 134, 347, 146]

[690, -10, 960, -860, 560, -560, -390, 520, -970, 130, 350, 150]