Round to Nearest 10, 100, and 1,000

Rounding makes numbers easier to work with by replacing an exact value with a nearby benchmark. We round to the nearest ten, hundred, or thousand depending on how precise we need to be.

The Rounding Rule

• Look at the digit one place to the right of the place you are rounding to.
• If that digit is 5 or more, round up — add 1 to the rounding digit.
• If that digit is 4 or less, round down — keep the rounding digit the same.
• Replace all digits to the right of the rounding place with zeros.

Rounding to the Nearest Ten

• Look at the ones digit.
• If ones ≥ 5, round the tens digit up; if ones ≤ 4, keep the tens digit.
• Example: 2,349 → look at 9 (ones). 9 ≥ 5, so 2,349 rounds up to 2,350.

Rounding to the Nearest Hundred

• Look at the tens digit.
• If tens ≥ 5, round the hundreds digit up; if tens ≤ 4, keep the hundreds digit.
• Example: 46,521 → look at 2 (tens). 2 ≤ 4, so 46,521 rounds down to 46,500.

Rounding to the Nearest Thousand

• Look at the hundreds digit.
• If hundreds ≥ 5, round the thousands digit up; if hundreds ≤ 4, keep the thousands digit.
• Example: 3,700 → look at 7 (hundreds). 7 ≥ 5, so 3,700 rounds up to 4,000.