Guide to Round Decimal Numbers to the Nearest Whole Number

What are the rules to Rounding Decimal Numbers to Whole Numbers?

• It completely relies on the value of the tenth place of the number. The tenth place of a Decimal Number is the number right after the decimal point.

For example, The value of the tenth place of 329.547 is 5.

• If the value of the tenth place of a number is 5 or more (greater than 5), then the value of the place one will be increased by 1.

For example, The value of the place one of  329.547 is 9

If we round 329.547 to a whole number, the value will change to 330.
In the same way, rounding 2453.710 will get you the whole number 2454.

• If the value of the tenth place is 4 or less than 4, then you just need to remove everything after decimal point (including decimal symbol) and remain digits will be the whole number.

For example, If the decimal number is 32.23902, the rounded whole number will be 32. This is because 2 is less than 5
In the same way, rounding 2959.49 will get you whole number 2959.

More Examples with a short chart: 

Decimal Numbers	Whole Numbers
492.534	493
23.90	24
199.609	200
39.50	40
109.013	109
12329.50	12330

Calculator: Rounding Decimal Numbers to Whole Numbers

Note: You should enter numbers only. If you do not type numbers or just leave it blank the result will be 0.

Note: Do not misuse the calculator to solve all your problems. You will weaken your learning if you do so. That calculator is just to test if you got it right.

Let’s solve a few problems:

Question: Can you round the digit $59.90 in the whole number?

Answer: In $59.90, the tenth place has the digit 9 that is greater than 5, so the whole number will be $60.

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Question: Get the whole number of 346.5421.

Answer: In 346.5421, the tenth place has number 5. As we said earlier, if it is 5 or more, we will add 1 to the at place one. The number as Place one is 6  (346.5421). So the whole number will be 347.

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Question: Round the number 982.014 to a whole number.

Answer: The whole number will be 982 because we have 0 at the tenth place (982.014), and 0 is less than 5.

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Question: Round 521.321 to a whole number.

Answer: 3 is less than 5 that holds the tenth position in 521.321. So the answer is 521.

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A video with more examples to learn the Rounding of Decimals to the Nearest Whole Number

Worksheet

Decimal Numbers to Nearest Whole Number Worksheet (Download and Print to share among children)