642 + 798 round the answer to the nearest thousand = 1440
800
800
5
800
798 to the nearest tens place = 800
Oh, what a happy little question! To round .798, we look at the next decimal place, which is 9. Since 9 is greater than 5, we round up the 8 to 1, making it .80. Just a gentle touch of rounding to bring a smile to your numbers.
800
800
6 174 798 604 is your answer.
400
800
-798 is the ratio of -798 and 1. That's rational.