16.7049 to first decimal place becomes 16.7.
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1.1 is to the first decimal place
The first place to the right of the decimal point.
The '9' is in the "first decimal" place and the '3' is in the "second decimal" place.Rules for roundingIf the number in the second decimal place is 5 or greater then the number in the first decimal place is rounded upwards by 1.If the number in the second decimal place is 4 or less then the number in the first decimal place is left unchanged.As the problem in this case is 3.93 and the number in the second decimal place is less than 5, we end up with3.9 "correct to one decimal place" or "rounded to one decimal place".
The first to the right of the decimal point.
First, determine what number is in the second decimal place. As it is a five in this case, the first decimal place is rounded up with the answer becoming 3.5.