Rounding off a number is done to make the calculation easier, it does not give us the perfect answer but an approximation.
A number ending with 0, 1, 2, 3, and 4 is rounded down.
example: 10.583 will be equal to 10.57
A number ending with 5, 6, 7, 8, and 9 is rounded up.
example: 10.587 will be equal to 10.59
Given number = 156.789
For ones, the round-off value will be 157, as the number at the one place after the decimal is 7.
For the tenth, the round-off value will be 156.8, as the number at the tenth place after the decimal is 8.
For the Hundredth, the round-off value will be 156.79, as the number at the Hundredth place after the decimal is 9.
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