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Rounding

Recall the place value chart. The number 5234 can be written in the place value chart as follows:

 

Thousands Hundreds Tens Ones
5 2 3 4

 

Steps for rounding numbers:

To round the number to a given place, locate the rounding digit (which is the digit at the place you are rounding to). Then, check the digit immediately to its right.

 

  • If this digit is 5 or more, then add 1 to the rounding digit (this is called rounding up) and change all digits to its right to 0.
     
  • If this digit is less than 5, then keep the rounding digit the same (this is called rounding down) and change all digits to its right to 0.

For example: To round the number 808 to the nearest ten, look at its ones place digit.

It is 8, which is greater than 5. So, we round up.

 

808 → 810

 

So, 808 rounded to the nearest ten is 810.





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Help

The correct answer is

Remember :

The smallest number is the one that comes first while counting.

Solution :

To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.

21,27,23

21 is the smallest number.