Rules for rounding to hundreds
Mathematical rounding of a number to the nearest hundred.
Third digit before the dot (hundred of the number):
- does not change – if the second digit before the dot is less than 5. (0; 1; 2; 3; 4);
- increases by 1 – if the second digit before the dot is greater than or equal to 5. (5; 6; 7; 8; 9).
4673.5 ≈ 4700
6 is the hundreds of the number, the third digit before the dot;
7 is the second digit before the dot;
7 is the rounded hundreds of the number.
Examples
Round the number 1224 to hundreds.
1224 ≈ 1200. The second digit before the dot 2 is less than 5.
Round the number 1257 to hundreds.
1257 ≈ 1300. The second digit before the dot is 5.
Round the number 1286 to hundreds.
1286 ≈ 1300. The second digit before the dot 8 is greater than 5.