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Estimating to Nearest tens by Rounding off Video Lecture | Mathematics & Pedagogy - CTET & State TET

151 videos|108 docs|69 tests

FAQs on Estimating to Nearest tens by Rounding off Video Lecture - Mathematics & Pedagogy - CTET & State TET

1. What is rounding off to the nearest tens?
Ans. Rounding off to the nearest tens means approximating a given number to the nearest multiple of ten. For example, rounding off 47 to the nearest tens would be 50, and rounding off 82 to the nearest tens would be 80.
2. How do I round off a number to the nearest tens?
Ans. To round off a number to the nearest tens, you need to consider the digit in the ones place. If the digit is 5 or greater, you round up to the next higher multiple of ten. If the digit is less than 5, you round down to the lower multiple of ten. For example, to round off 68 to the nearest tens, you round it down to 60, and to round off 93, you round it up to 100.
3. Can you provide an example of rounding off to the nearest tens?
Ans. Sure! Let's say we have the number 76. To round it off to the nearest tens, we look at the digit in the ones place, which is 6. Since 6 is greater than 5, we round up to the next higher multiple of ten, which is 80. Therefore, rounding off 76 to the nearest tens would be 80.
4. Why do we round off numbers to the nearest tens?
Ans. Rounding off numbers to the nearest tens is useful when we want to simplify and approximate numbers for easier calculations or for presenting data in a more manageable form. It helps in reducing the complexity of numbers and makes them easier to work with.
5. Is rounding off to the nearest tens accurate?
Ans. Rounding off to the nearest tens introduces some degree of approximation, which means it may not always give the exact value of the original number. However, it provides a close estimation that is usually sufficient for many practical purposes. The accuracy depends on the level of precision required for the specific situation or calculation.
151 videos|108 docs|69 tests
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