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math worksheet answer key titled
"Rounding Up to 2 Decimal Places Sheet 1 Answers" from
Math-Salamanders.com. The sheet contains three sections with rounding exercises:
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🔹 Section 1: Round to the Nearest Whole Number
You round each number to the nearest whole number (i.e., to zero decimal places).
Rules:
- Look at the
tenths digit (the first digit after the decimal).
- If it’s
5 or more, round
up.
- If it’s
less than 5, round
down.
✔ Examples:
- 3.94 → 4 (because 9 ≥ 5)
- 12.14 → 12 (because 1 < 5)
- 23.2 → 23 (because 2 < 5)
All answers in this section are correct.
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🔹 Section 2: Round to the Nearest Tenth
Round to
one decimal place.
Rules:
- Look at the
hundredths digit (second digit after decimal).
- If it’s
5 or more, round up the tenths digit.
- If it’s
less than 5, keep the tenths digit as is.
✔ Examples:
- 4.83 → 4.8 (because 3 < 5)
- 1.94 → 1.9 (because 4 < 5)
- 15.28 → 15.3 (because 8 ≥ 5)
- 3.97 → 4.0 (because 7 ≥ 5, so 3.9 becomes 4.0)
All answers here are correct.
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🔹 Section 3: Round to 2 Decimal Places (2dp)
Round to
two decimal places.
Rules:
- Look at the
thousandths digit (third digit after decimal).
- If it’s
5 or more, round up the hundredths digit.
- If it’s
less than 5, keep the hundredths digit as is.
✔ Examples:
- 1.174 → 1.17 (because 4 < 5)
- 5.029 → 5.03 (because 9 ≥ 5 → 2 becomes 3)
- 0.017 → 0.02 (because 7 ≥ 5 → 1 becomes 2)
- 3.996 → 4.00 (because 6 ≥ 5 → 9+1 = 10, so carry over: 3.99 + 0.01 = 4.00)
All answers in this section are also correct.
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✔ Summary
The
answer key is accurate and complete. All rounding follows standard mathematical rules.
#### Key Rounding Rules Recap:
| Round To | Look At | Rule |
|----------------|----------------|------|
| Nearest whole | Tenths digit | ≥5 → up; <5 → down |
| Nearest tenth | Hundredths digit | ≥5 → up; <5 → keep |
| 2 decimal places | Thousandths digit | ≥5 → up; <5 → keep |
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Parent Tip: Review the logic above to help your child master the concept of rounding decimals worksheet problems.
