## Topic outline

• ### Rounding Numbers

• Rounding Off Large Numbers/Rounding Off Whole Numbers

Rounding off to the nearest 10

If the digit in the ones place is 0, 1, 2, 3, or 4 (i.e. < 5) then replace ones place by ‘0’.

If the digit in the ones place is 5, 6, 7, 8 or 9 (i.e. > 5 or = 5, but < 10), then replace ones digit by ‘0’ and add 1 to the tens place.

Rounding off to the nearest 100

If the digit in the tens place is 0, 1, 2, 3, or 4 (i.e. < 5) then replace ones and tens places by ‘0’.

If the digit in the tens place is 5, 6, 7, 8 or 9 (i.e. > 5 or = 5, but < 10), then replace ones and tens places by ‘0’ and add 1 to the hundreds place.

Rounding off to the nearest 1000

If the digit in the hundred place is 0, 1, 2, 3, or 4 (i.e. < 5) then replace ones, tens and hundred places by ‘0’.

If the digit in the hundreds place is 5, 6, 7, 8 or 9 (i.e. > 5 or = 5, but < 10), then replace ones, tens and hundred places by ‘0’ and add 1 to the thousands place.

Rounding off to the nearest 10,000

If the digit in the thousands place is 0, 1, 2, 3, or 4 (i.e. < 5) then replace ones, tens, hundred and thousand places by ‘0’.

If the digit in the thousands place is 5, 6, 7, 8 or 9 (i.e. > 5 or = 5, but < 10), then replace ones, tens, hundred and thousands places by ‘0’ and add 1 to the ten thousands place.

Rounding off to the nearest 1,00,000

If the digit in the ten thousands place is 0, 1, 2, 3, or 4 (i.e. < 5) then replace ones, tens, hundred, thousand and ten thousand places by ‘0’.

If the digit in the ten thousands place is 5, 6, 7, 8 or 9 (i.e. > 5 or = 5, but < 10), then replace ones, tens, hundreds, thousands and ten thousands places by ‘0’ and add 1 to the lakh place.