Round any number to the nearest 10, 100, 1000, or any decimal place.
Rounding Calculator
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Standard rounding: if the digit to the right is 5 or more, round up; if less than 5, round down. Ceiling always rounds up; Floor always rounds down.
3847 rounded to nearest 10 = 3850. Look at the ones digit (7 ≥ 5), so round up.