Since 770 is a whole number, it is already rounded to the nearest thousandth.
Or could it be 770.000?
The whole number part ends with 5, so it rounds up to 770.
Well, honey, the nearest ten of 769 is 770. I mean, it's not rocket science. Just round up that 769 to the nearest ten and you've got your answer. Easy peasy lemon squeezy.
800
To the nearest ten, 770
Well, honey, if you want to round 760 to the nearest ten, you just look at the digit in the tens place, which is 6. Since 6 is greater than 5, you round up. So 760 rounds up to 770. Easy peasy lemon squeezy!
762 rounded to the nearest ten is 760
765
770
If we round $776 to the nearest $10, that is $780. Note that you only need to increase $776 by $4 to get to $780, but you would need to decrease it by $6 to get to $770. That's why this amount is nearer to $780 than to $770.
770
770
770