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Rounding Decimal Numbers Part 1

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CCSS.Math.Content.5.NBT.A.4

Recall the place value chart. The number 12.35 can be written in the place value chart as follows:

 

Ones Tens . Tenths Hundredths
1 2 . 3 5

 

Steps for rounding decimals:

 

To round the decimal 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 remove all the digits to its right.
     
  • If this digit is less than 5, then keep the rounding digit the same (this is called rounding down) and remove all the digits to its right.

 

 

For example: To round the number 70.17 to the nearest tenths, look at its hundredths place digit.

It is 7, which is greater than 5. So, we round up.

 

70.17 → 70.2

 

So, 70.17 rounded to the nearest tenth is 70.2.





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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.

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