A mesma casa de arredondamento e o mesmo método valem para as duas abas.
Resultado arredondado
Original vs rounded value with error band.
Digit inspected
We highlight both the place you round to and the digit you look at for the rounding decision.
Steps
What you can do
- Round to any decimal or integer place, with the digit you inspected highlighted.
- See the maximum error and the possible true-value band on a number line.
- Compare intermediate vs final rounding on
(A op1 B) op2 Ctemplates. - Copie uma URL compartilhável ou o LaTeX, baixe o SVG da faixa de erro e ative o modo professor.
Perguntas frequentes
Which digit Devo look at when rounding to the nth decimal?
Look at the digit one place to the right of where you round. If it is 5 or more, round up; otherwise round down.
How Devo round to the nearest ten?
Use the ones place as the decision digit. For example, 368 becomes 370 (error ±5).
How Devo express the error range of an approximation?
With half-up rounding, half of the unit is the maximum absolute error. Rounding to 1 decimal gives ±0.05, so the true value is within that band.
Por que rounding midway change the answer?
Once a rounded value is used in the next operation, its error can accumulate or be amplified, leading to a different final Resultado.
How is rounding of negative numbers handled?
We use “away from zero” half-up. −1.5 becomes −2, while −1.25 becomes −1.
Is my Entrada sent to a server?
No. Everything runs locally in your browser, including the charts.