What is meaning of Estimate
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Yogita Ingle 5 years, 1 month ago
The estimation of a number is a reasonable guess of the actual value. Estimation means approximating a quantity to the accuracy required. This is done by rounding off the numbers involved and getting a quick and rough answer.
Rounding off a number to the nearest tens
The numbers 1, 2, 3 and 4 are nearer to 0. So, these numbers are rounded off to the lower ten. The numbers 6, 7, 8 and 9 are nearer to 10. So, these numbers are rounded off to the higher ten. The number 5 is equidistant from both 0 and 10, so it is rounded off to the higher ten.
e.g.
(i) We round off 31 to the nearest ten as 30
(ii) We round off 57 to the nearest ten as 60
(iii) We round off 45 to the nearest ten as 50
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