Estimating Sums Worksheet

Name:

Date:

🎯 WALT: We Are Learning To estimate sums by rounding to the nearest thousand

Success Criteria:

✓ I can round numbers to the nearest thousand
✓ I can estimate the sum of two numbers by rounding before adding
✓ I can explain my estimation using the words 'about' and 'close to'

📊 Part 1: Rounding Practice

1. Round these numbers to the nearest thousand:

a) 4,527 rounds to ____________

b) 3,162 rounds to ____________

c) 6,843 rounds to ____________

d) 2,456 rounds to ____________

2. Circle the correct rounded number:

8,721 rounded to the nearest thousand is:

8,000

9,000

8,700

3. Which number rounds to 5,000?

4,623

5,234

4,891

5,567

🧮 Part 2: Estimating Sums

4. Estimate these sums by rounding first:

Example: 4,527 + 3,162

Round: 5,000 + 3,000 = 8,000

The sum is about 8,000

a) 6,843 + 2,456

Round: _______ + _______ = _______

The sum is about _________

b) 7,291 + 4,638

Round: _______ + _______ = _______

The sum is about _________

5. Choose the best estimate for 8,765 + 3,234:

About 11,000

About 12,000

About 13,000

6. Explain your thinking:

How did you estimate 8,765 + 3,234? Use the words "about" or "close to" in your answer.

💰 Part 3: Real Life Estimating

7. A school needs to buy supplies costing $4,567 and equipment costing $3,891. About how much money do they need in total?

8. Two towns have populations of 6,234 and 4,876 people. Estimate the total population of both towns combined.

My estimate: The total population is close to _____________ people.

9. Show your working:

Differentiation Support:

• Use base-10 blocks or number lines to help with rounding
• Ask a teacher to read questions aloud if needed
• Use a calculator to check your estimates
• Remember: estimates don't need to be exact - they should be close to the real answer!