Look at the number in the second decimal place. If that number is 4 or less, zero it and everything to the right of it out. If that number is 5 or higher, increase the first decimal place by one and zero everything to the right of it out.
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4.9
Look at the number in the fifth decimal place. If it is 4 or below, zero it and anything to the right of it out. If it is 5 or higher, increase the fourth place digit by one and zero anything to the right of it out.
If you were rounding to one decimal place, then yes you would.
when a value is rounded to one decimal place, it means that there is only one number after the decimal point.For example:6.732 becomes 6.7 when rounded to one decimal place.be careful though because if you had:4.376 it would become 4.4 when rounded to one decimal place because the '7' would have to be rounded up as it is greater than 5.
The answer is 15.8