The rounding calculator or number rounder is used to simplify a number to the required length.
The calculator contains a number of options including rounding to whole numbers and decimal places.
To use this calculator;
Significant figures are closely related to rounding off. It is also possible to round a number with the perspective of the significant figures.
Rounding off is a technique used in maths and stats to reduce or extend a number to a certain place value, suitable to the conditions. For example:
4.0001 is rounded off to 4 and 56 can be rounded off as 56.00.
There are a number of reasons this technique is used. It is used for making numbers convenient for the calculation process.
Another reason is to make multiple measurements of the same length to remove any precision error.
The most suitable way is to use the Rounding decimals calculator above. As far as the manual process is concerned, there are a number of steps you will need to carry out.
Note: If the number is rounded off to a whole place value, the remaining digits are converted to zero and they remain a part of the number. While in decimal values, the numbers are simply dropped.
Assume the number to be 456.321. Now,
Look for the hundredth place digit. The digit 2 is the hundredth place value.
The final result is 456.32. The last 1 was dropped due to rounding down.
Let’s take the number 78.781. Now,
The final result is 78.8. The last 8 and 1 were dropped due to rounding up. And 1 was added into 7.
All the steps are the same as before.
Example:
5678
Solution:
Step 1: Identify the ten place value.
It is 7.
Step 2: Roundoff.
8 is greater than 5 so the number will be rounded up.
The result is 5680.
The unit and ten values are changed to zero. See the example to learn more.
Example:
Round 45609.2 to nearest hundred.
Solution:
Step 1: Recognize the hundred’s place.
The digit 6 is at the hundred’s place.
Step 2: Look for the number right next to it.
It is 0.
Step 3: Roundoff.
Nothing will be added to 6. The ten and unit digits will be turned to zero. While the number after the decimal point will be dropped.
The rounded form is 45600. Use the Round off calculator to verify all of these examples.