Question

Round off the following number to the nearest ten, hundred and thousand.​(i) $864$

Answer 1

(i)Given number is $864$
So , the unit place digit of $864$ is $4$.
[If the digit at one's place is less than $5$, replace one's digit by $0$, and keep the other digits as they are. Also , if the digit at one's place is $5$ or more than $5$ , increase tens digit by $1$ , and replace one's digit by $0$ ]

$\because$ Unit place digit is $4$.
So , to round off the given number $864$ to the nearest ten, we replace $4$ (unit digit) by $0$ and keep the other digits as they are.

$\therefore$ $864$ is $860$.
Hence, round off of the given number $864$ is to nearest tens $860$.

(ii)Given number is $864$
So , the tens place digit of $864$ is $6$.
[If the tens digit is less than $5$, replace each one of tens and one's digit by $0$, and keep the other digits as they are. Also , if the digit is $5$ or more than $5$ , increase hundreds digit by $1$ , and replace each of ten's digit and one's digit by $0$ ]

$\because$ $6$ is more than $5$.
So , to round off the given number to the nearest hundred, we increase $8$ hundreds digit) by $1$and replace $6$ (ten's digit) and $4$ (one's digit ) by $0$

$\therefore$ $864$ is $900$.
hence, round off $864$ to nearest hundred is $900$

(iii)Given number is $864$
So , the hundreds digit of $864$ is $8$.

[If the hundreds digit is less than $5$, replace each one of hundreds,tens and one's digit by $0$, and keep the other digits as they are. Also , if in the given number ,hundreds digit is $5$ or more than $5$ , increase thousands digit by $1$ , and replace each other digit on its digit by $0$ ]

$\because$ $8$ is more than $5$.
So , to round off the given number to the nearest thousand , we increase $0$thousands digit) by $1$and replace $8$ (hundreds digit) ,$6$ (ten's digit) and $4$ (one's digit ) by $0$

$\therefore$ $864$ is $1000$.
Hence, round off $864$ to nearest hundred is $1000$.