Fourth Grade Rounding Off

Successor-Predecessor
1) The number one less than a given number is called its Predecessor
Ex: Predecessor of 3804 is 3803
2) The number one more than a given number is called its Successor
Ex: Successor of 578 is 579
Rounding off Numbers to the nearest 10
Rule 1: If the digit at the ones place is less than 5 i.e., 0, 1, 2, 3, or 4, round off number downwards by replacing ones digit by 0.
Ex 1: Round off 5873 to nearest 10.
Ans: 5870
Rule 2: If the digit at the ones place is 5, 6, 7, 8 or 9, round off the number upwards by increasing the digit at the tens place by 1 and changing the digit at the ones place into 0.
Ex 2: Round off 5876 to nearest 10.
Ans: 5880
Rounding off Numbers to the nearest 100
Rule 1: If the digit at the tens place is 4, 3, 2, 1 or 0 (less than 5), round off the number downwards by keeping the digit in the hundreds place as it is and changing the digits in the ones and tens places in to 0s.
Ex 1: Round off 58739 to nearest 100.
Ans: 58700
Rule 2: If the digit at the tens place is 5, 6, 7, 8 or 9 (equal to or more than 5), round off the given number upwards by increasing the digit in the hundreds place by 1 and changing the digits in the tens and ones place into 0s.
Ex 2: Round off 58767 to nearest 100.
Ans: 58800
Rounding off Numbers to the nearest 1000
Rule 1: If the digit at the hundreds place is 4, 3, 2, 1 or 0 (less than 5), round off the given number downwards by keeping the digit in the thousands place as it is and changing the digits in the ones, tens and hundreds places into 0s.
Ex 1: Round off 58239 to nearest 1000.
Ans: 58000
Rule 2: If the digit at the hundreds place is 5, 6, 7, 8 or 9 (equal or more than 5), round off the given number upwards by increasing the digit at the thousands place by 1 and changing the digits at the hundreds, tens and ones places into 0s.
Ex 2: Round off 58767 to nearest 1000.
Ans: 59000
Roundingoff Worksheet1
Roundingoff Worksheet2
Roundingoff Worksheet3