Rounding off numbers to the nearest 10, 100 and 1000 – Video Explanation
Rounding numbers to the nearest 10 ( Tens )
(1) For rounding off numbers to the nearest tens. we will first check if the ones digit is greater than or lesser than 5.
(2) If the one’s digit is greater than 5, we will increase tens digit by 1, and replace ones digit by 0.
(3) If one’s digit is lesser than 5, we will replace ones digit by 0, and other digits remain same.
Question – Rounding up the given numbers to the nearest ten.
a) 49
Explanation
In, present case,
49 has the number 9 in ones place
Since,
9 > 5
Hence, the required rounded number = 50
b) 53
Explanation
In, present case,
53 has the number 3 in ones place
Since,
3 < 5
Hence, the required rounded number = 50
Rounding up to the nearest 100 ( Hundreds )
(1) In order to rounding off numbers to the nearest hundreds we will first check if the tens digit is greater than or lesser than 5
(2) If the ten’s digit is greater than 5, we will increase hundreds digit by 1 and replace tens or ones digit by 0.
(3) If the ten’s digit is lesser than 5, we will replace tens or ones digit by 0, and other digits remain same.
Question – Rounding up the given numbers to the nearest hundred.
a) 427
Explanation
In, present case,
We have 427 in which 2 is in tens place and 7 in ones place
We know that 2 < 5
Hence, the required rounded number is 400
b) 672
Explanation
In, present case,
We have 672 in which 7 is in tens place and 2 in ones place
We know that 7 > 5
Hence, the required rounded number is 700
Round off to the nearest 1000 ( Thousands )
(1) In order to rounding off number to the nearest thousands we will first check if the hundreds digit is greater than or lesser than 5
(2) If the hundred’s digit is greater than 5, we will increase thousands digit by 1 and replace hundreds, tens and ones digit by 0.
(3) If the hundred’s digit is lesser than 5, we will replace hundreds, tens and ones digits by 0, and other digits remain same.
Question – Rounding up the given numbers to the nearest thousand.
a) 3846
Explanation
In, present case,
We have 3846 in which 8 is in hundred place , 4 is in tens place and 6 in ones place
So, 8 > 5
Hence, the required estimated number is 4000
b) 8467
Explanation
In, present case,
We have 8467 in which 4 is in hundred place , 6 is in tens place and 7 in ones place
So, 4 < 5
Hence, the required estimated number is 8000.