Rounding decimals
When rounding decimals, follow the three steps outlined below to the letter:
Did you understand the steps outlined above? Do you need more explanations?
In more details, here are the steps to follow when rounding decimals
Step #1:
Find the place you are rounding to. Is it the tenths, the hundredths, or the thousandths?
Step #2:
If the digit to the right of the place you are rounding to is 5 or more, add 1 to the place you are rounding to.
If it is less than 5, add nothing.
Step #3: Drop all the digits to the right of the place you are rounding to.
A couple of examples showing how to round decimals by following the steps outlined above.
Example #1:
Round 2.1582 to hundredths.
Step #1The place you are rounding to is the place the number 5 holds: 2.1
582
Step #2 The digit to the right of 5 is 8 and it is at least 5.
Therefore, we can add 1 to 5 to make it 6.
Step #3
Drop 82 (all digits to the right of 5)
The answer is 2.16
Example #2:
Round 4.241 to tenths
Step #1The place you are rounding to is the place the number 2 holds: 4.
241
Step #2 The digit to the right of 2 is 4 and it is less than 5.
Therefore, we add nothing to 2.
Step #3
Drop 41 (all digits to the right of 2)
The answer is 4.2
A few more examples showing how to round decimals.
Round 5.18 to tenths
1 is in the tenths place. Since 8 ≥ 5, add 1 to 1 and
the answer is 5.2.
Round 0.498 to hundredths
9 is in the hundredths place. Since 8 ≥ 5, add 1 to 9 and the answer is 0.50.
Note that adding 1 to 9 gives 10. Write down 0 in the hundredths place and carry the 1 to the tenths place. Just put the 1 above the 4; Finally add 1 to 4 to get 5.
If you are having a hard time understanding this, just go to adding decimals for more information.
Round 0.04 to tenths
The answer is 0.0
Note that we do not add anything to 0 because 4 is less than 5.
Rounding decimals quiz. Use the quiz below to test your knowledge.

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