1000.0 because you round the .5 up and it makes the 999 go up to 1000 so you would get 1000.0
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Well, honey, to round 0.85 to one decimal place, you look at the next digit after the first decimal. Since 5 is greater than 5, you round up the 8 to 9. So, 0.85 rounded to one decimal place is 0.9. Easy peasy lemon squeezy!
The digit at the fourth decimal place is 5. The next digit, 7 is bigger than 5 and so the digit at the fourth decimal place must be rounded up - to 12.4286
Well, isn't that just a happy little number we have there! To round 0.00045 to the nearest decimal place, we look at the next digit after the decimal point, which is 5 in this case. Since 5 is greater than or equal to 5, we round up, making 0.00045 into 0.0005. Just a tiny adjustment to bring a little more clarity and simplicity to our number world.
Well, darling, to round up 0.45 to 2 decimal places, you simply look at the third decimal place. If it's 5 or greater, you round the second decimal place up by 1. So, 0.45 becomes 0.50. Voilà, math magic at its finest!
The way you round numbers is to look at the number immediately to the right of the place you want to round. In this case, you're looking at the number 4 because that is the next number after the first decimal place. If that number is 5 or greater, you round up to the next number; if it is less than 5 you stay the same. 4 is less than five so you leave the number 1 as a 1 and have 3.1 hours.