Class 6 Maths Knowing Our Numbers Estimation by Rounding off

Estimation by Rounding off

Rounding off means changing the most insignificant value to its nearest zero figure. This makes the number more readable and easy for estimation.

Rounding off place

Round off pattern

Example

Units place (estimating to nearest tens)

If the number at units place is less than 5 then it is rounded of zero otherwise to 10.

62 can be rounded off to 60.

126 can be rounded off to 130.

14265 can be rounded off to 14270.

Tens place (estimating to nearest hundreds)

If the number at tens place is less than 49 then it is rounded of zero otherwise to 100.

410 can be rounded off to 400.

5763 can be rounded off to 5800.

53650 can be rounded off to 53700.

Hundrerds Place (estimating to nearest thousands)

If the number at hundreds place is less than 499 then it is rounded of zero otherwise to 1000.

1343 can be rounded off to 1000.

26721 can be rounded off to 27000.

6324513 can be rounded off to 6325000.

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