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Rounding Decimals Practice Worksheet

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Rounding Decimals Practice Worksheet worksheet preview

Rounding Decimals Practice Worksheet

Decimal rounding illustration

🎯 Learning Goals

I can... round decimal numbers to the nearest whole number, tenth, or hundredth.

Success Criteria:

  • I can identify the place value I'm rounding to
  • I can look at the digit to the right to decide whether to round up or down
  • I can round decimals accurately using the rules: 5 or greater rounds up, less than 5 rounds down

📚 Part 1: Multiple Choice

1. Round 45.678 to the nearest whole number.

45

46

45.7

50

2. Round 123.456 to the nearest tenth.

123.4

123.5

123.46

124

3. Round 87.294 to the nearest hundredth.

87.2

87.29

87.30

87.3

4. Which decimal rounds to 200 when rounded to the nearest whole number?

199.4

200.6

199.8

All of the above

✏️ Part 2: Practice Problems

5. Round each decimal to the nearest whole number:

a) 56.789 = _______

b) 234.123 = _______

c) 99.501 = _______

6. Round each decimal to the nearest tenth:

a) 78.456 = _______

b) 145.682 = _______

c) 267.349 = _______

7. Round each decimal to the nearest hundredth:

a) 34.567 = _______

b) 189.234 = _______

c) 456.789 = _______

8. Show your work: Round 345.678 to the nearest tenth. Explain your thinking.

🌟 Extension Challenge

9. A store sells apples for $2.347 per pound. Round this price to the nearest cent (hundredth).

Answer: $ _______

10. Critical Thinking: Explain why 5.95 rounds to 6.0 when rounded to the nearest tenth, but write what it would round to if rounded to the nearest hundredth.

📋 Answer Key

Multiple Choice: 1) b, 2) b, 3) b, 4) d

Practice Problems:

5) a) 57, b) 234, c) 100

6) a) 78.5, b) 145.7, c) 267.3

7) a) 34.57, b) 189.23, c) 456.79

8) 345.7 (look at 7 in hundredths place, round up)

9) $2.35

10) Rounds to 6.0 (tenth), stays 5.95 (hundredth)

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