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Decimal Multiplication Mastery
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Decimal Multiplication Mastery
📊 Part 1: Estimation and Reasoning
1. Estimate the answer to 2.3 × 45 by rounding. Show your working:
2. Circle the most reasonable estimate for 4.7 × 28:
120
140
200
280
3. Explain why 3.2 × 15 will give an answer less than 15 × 15:
✏️ Part 2: Vertical-Column Multiplication
4. Calculate 2.3 × 45 using the vertical-column method. Show all steps:
5. Solve these decimal multiplications. Remember to estimate first:
a) 1.4 × 26
Estimate: _________ Calculation:
b) 3.75 × 12
Estimate: _________ Calculation:
6. Explain how you know where to place the decimal point in your answer for question 5b:
🌍 Part 3: Real-World Applications
7. A notebook costs $2.35. How much will 18 notebooks cost?
Equation: _________________
Estimate: _________________
Answer: _________________
8. Sarah is buying fabric that costs $4.60 per metre. She needs 25 metres. Calculate the total cost:
Total cost: $ _________________
9. A recipe calls for 1.25 kilograms of flour. If you want to make 16 batches, how much flour do you need in total?
Total flour needed: _________ kg
10. Check your answer to question 9 by explaining if it's reasonable:
About This Worksheet
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