10.60 rounded to the nearest thousandths is 10.6 because the rule is that when the next number is below 5, the number just stays the same, but if the next number is 5 or above 5, you will add 1 to the number you are rounding off. Since the next number to 6 is 0, the number will just stay the same and become 10.6. If your number is 10.68, the number will be change to 10.7 because you will add 1 to 6. I hope that helps :)
