Decimal Operations Practice

Name:

Date:

Calculator and decimal numbers illustration

🎯 WALT: We Are Learning To

• Divide decimals by whole numbers

• Add, subtract, and multiply decimals confidently

• Use estimation to check if answers are reasonable

🧮 Part 1: Decimal Division

1. Calculate: 12.6 ÷ 3 = _______

2. A piece of rope is 8.4 metres long. It's cut into 4 equal pieces. How long is each piece?

Each piece = _______ metres

3. Sarah spent $15.75 on 5 identical pens. How much did each pen cost?

Each pen costs $________

4. Choose the correct answer for 28.8 ÷ 6:

4.6

4.8

5.2

5.4

➕➖✖️ Part 2: Mixed Decimal Operations

5. Calculate: 15.7 + 8.94 = _______

6. Calculate: 20.5 - 12.87 = _______

7. A school kapa haka group needs to buy costumes. Each costume costs $24.75. If they need 8 costumes, what's the total cost?

Total cost = $________

8. Estimation Challenge: Before calculating 19.8 × 4.1, estimate the answer by rounding to whole numbers.

My estimate: _______ × _______ = _______

Actual calculation: 19.8 × 4.1 = _______

9. Real-world Problem: A environmental group measured rainfall over 5 days: 12.3mm, 8.7mm, 15.2mm, 6.8mm, and 11.4mm. What was the total rainfall? What was the average daily rainfall?

Total rainfall = _______ mm

Average daily rainfall = _______ mm

🌟 Extension Challenge

10. Advanced: A sports field is 125.6 metres long. If it's divided into 8 equal sections for training, how long is each section? Then calculate the total length of 3 sections.

Each section = _______ metres

3 sections = _______ metres

11. Problem Solving: Explain in your own words how you check if your decimal division answer is reasonable.