Round a value to a chosen decimal place without hiding which digit controls the change. Its rounded number sits beside the working formula for a quick arithmetic check.
The Rounding case starts with Number and Decimal places. Recalculate Rounded number from those entries. A nearby Decimal places can challenge the Rounding relationship, but its Rounded number belongs to a separate Rounding record.
Locate the requested place, underline its digit, and inspect the digit immediately to its right. Add one when that deciding digit is 5 or more, then replace discarded whole-number positions with zeros.
Rounding 47.3865 to two decimal places inspects the third decimal digit, 6. The hundredths digit rises from 8 to 9, producing 47.39.
Invoices, measurements, estimates, and published tables often need fewer digits than the working calculation. Keeping the unrounded source nearby prevents a presentation choice from silently becoming new data.
Rounding is different from truncation, which simply removes trailing digits. Negative place counts round tens, hundreds, or larger positions rather than digits after the decimal point.
Record the units for Rounding beside each source value; the reader must still confirm compatibility while performing rounding.
Rounding replaces a number with a nearby value at a stated place. The first discarded digit decides whether the retained digit stays or increases, while the place label explains the size of the permitted change. Another calculation beside Rounding is significant figures.
Decimal-place rounding counts positions relative to the decimal point. Significant-figure rounding instead begins at the first nonzero digit. Here the requested quantity is specifically rounded number.
Substitute the Rounding solution into Number. This Rounding check rejects false Rounding branches and forbidden denominators.
Choose an easy Number value before running Rounding. Predict Decimal places, then compare it with the Rounding output.
A boundary case can expose a Rounding setup error. Choose a simple Number, preserve Decimal places, and predict Rounded number. If the new Rounded number conflicts with that prediction, inspect the Rounding entries before relying on the less convenient case.
Yes. Minus one rounds to tens, minus two to hundreds, and so on.
This page uses half-away-from-zero rounding, so 2.5 becomes 3 and −2.5 becomes −3.
Usually no; carry working precision and round the final reported value.