Rounding Decimals Worksheet for practicing rounding to the nearest whole number, tenth, hundredth, and thousandth.

Let’s go step by step through each section of the worksheet. We’ll round each number as instructed — carefully checking the digit right after the place we’re rounding to.

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Section 1: Round to the nearest whole number

We look at the tenths digit (first digit after decimal). If it’s 5 or more, round up. If less than 5, keep the whole number.

1) 1.44 → tenths digit is 4 → less than 5 → 1
2) 6.234 → tenths digit is 2 → less than 5 → 6
3) 36.87 → tenths digit is 8 → 5 or more → 37
4) 19.67 → tenths digit is 6 → 5 or more → 20
5) 91.921 → tenths digit is 9 → 5 or more → 92
6) 15.014 → tenths digit is 0 → less than 5 → 15

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Section 2: Round to the nearest tenth

Look at the hundredths digit (second digit after decimal). If 5 or more, round up the tenths place.

1) 45.637 → hundredths digit is 3 → less than 5 → 45.6
2) 9.012 → hundredths digit is 1 → less than 5 → 9.0
3) 15.623 → hundredths digit is 2 → less than 5 → 15.6
4) 9.66 → hundredths digit is 6 → 5 or more → 9.7
5) 91.921 → hundredths digit is 2 → less than 5 → 91.9
6) 593.30 → hundredths digit is 0 → less than 5 → 593.3

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Section 3: Round to the nearest hundredth

Look at the thousandths digit (third digit after decimal). If 5 or more, round up the hundredths place.

1) 3.215 → thousandths digit is 5 → round up → 3.22
2) 44.444 → thousandths digit is 4 → less than 5 → 44.44
3) 0.009 → thousandths digit is 9 → round up → but 0.00 + 0.01 = 0.01
- Wait! Let’s check: 0.009 → hundredths place is 0, thousandths is 9 → so we add 1 to hundredths → 0.01 ✔️
4) 2.3838 → thousandths digit is 3 → less than 5 → 2.38
5) 8.005 → thousandths digit is 5 → round up → 8.00 + 0.01 = 8.01
6) 16.336 → thousandths digit is 6 → round up → 16.34

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Section 4: Round to the nearest thousandth

Look at the ten-thousandths digit (fourth digit after decimal). If 5 or more, round up the thousandths place.

1) 0.0091 → ten-thousandths digit is 1 → less than 5 → 0.009
2) 2.9999 → ten-thousandths digit is 9 → round up → 2.999 + 0.001 = 3.000
- Because 2.9999 rounded to thousandths: 9 in thousandths, next digit 9 → carry over → becomes 3.000 ✔️
3) 0.1335 → ten-thousandths digit is 5 → round up → 0.134
4) 60.618 → only three decimals → already at thousandths → 60.618
- No fourth digit? Then it’s exact → no change.
5) 8.1234 → ten-thousandths digit is 4 → less than 5 → 8.123
6) 0.196 → only three decimals → already at thousandths → 0.196

Wait — let me double-check #4 and #6 in Section 4:

- 60.618 → if written as 60.6180, then ten-thousandths is 0 → still rounds to 60.618 ✔️
- 0.196 → same thing → 0.1960 → ten-thousandths is 0 → stays 0.196 ✔️

Also, #2: 2.9999 → rounding to thousandths:
- Thousandths place is 9 (third decimal), next digit is 9 → so 9+1=10 → carry over → 2.999 + 0.001 = 3.000 ✔️

All good.

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Final Answer:

Round to the nearest whole number:
1) 1
2) 6
3) 37
4) 20
5) 92
6) 15

Round to the nearest tenth:
1) 45.6
2) 9.0
3) 15.6
4) 9.7
5) 91.9
6) 593.3

Round to the nearest hundredth:
1) 3.22
2) 44.44
3) 0.01
4) 2.38
5) 8.01
6) 16.34

Round to the nearest thousandth:
1) 0.009
2) 3.000
3) 0.134
4) 60.618
5) 8.123
6) 0.196