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### 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