----------means to find a number that is nearest to the original number but not exact.
(a) estimation (b) round off
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Answer is round off that is option b
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(b)Round off means to find a number that is nearest to the original number but not exact.
Step-by-step explanation:
- Rounding off numbers is a mathematical technique that adjusts the digits of a number to make it easier to use the number during calculations.
- Numbers are rounded off to a certain degree of accuracy to facilitate calculations and to understand the results.
For example, consider the number 399. To round off to the nearest significant number, consider tens place and follow the steps below:
1. Identify the digit in the tens place: 9
2. Find the next smallest place in the number: 9
3. If the digit of the smallest number is greater than or equal to 5, then round up the digit.
4. As the digit in the ones place is greater than 5, +1 has to be added.
5. Therefore, 9+1=10 and the 1 is carried to the next place.
So the final number is 400.
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