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Estimating and Rounding Numbers

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Estimating and Rounding Numbers worksheet preview

Estimating and Rounding Numbers

Number line and pencils illustration

📊 Part 1: Rounding to the Nearest Ten

1. Round these numbers to the nearest ten:

a) 47 rounds to _______

b) 83 rounds to _______

c) 156 rounds to _______

d) 294 rounds to _______

2. Which number rounds to 90 when rounded to the nearest ten?

82

87

95

103

3. Circle the numbers that round to 120 when rounded to the nearest ten:

115

118

124

127

💯 Part 2: Rounding to the Nearest Hundred

4. Round these numbers to the nearest hundred:

a) 238 rounds to _______

b) 467 rounds to _______

c) 352 rounds to _______

d) 189 rounds to _______

5. What is 274 rounded to the nearest hundred?

200

270

280

300

6. Explain why 450 rounds to 500 when rounded to the nearest hundred:

🎯 Part 3: Real-World Estimation

7. Your school needs to buy pencils for 3 classes. The classes have 37, 42, and 39 students. Each pack contains 10 pencils.

a) Round each class size to the nearest ten:

Class 1: 37 → _______

Class 2: 42 → _______

Class 3: 39 → _______

b) Estimate the total number of students: _______

c) How many packs of pencils should the school buy? _______

8. A cinema has 387 seats. For safety planning, they need to round this to the nearest hundred. How many seats should they plan for?

300 seats

380 seats

390 seats

400 seats

9. Explain why estimation and rounding are useful in everyday life. Give one example:

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