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Decimal Multiplication Facts

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Decimal Multiplication Facts worksheet preview

Decimal Multiplication Facts

Decimal multiplication illustration

🎯 Part 1: Estimate First, Then Calculate

Instructions: For each problem, write your estimate first, then calculate the exact answer using the vertical column method. Show your working.

1. 0.4 × 3

Estimate: ________ Exact answer: ________

2. 0.7 × 5

Estimate: ________ Exact answer: ________

3. 0.6 × 9

Estimate: ________ Exact answer: ________

4. 0.8 × 4

Estimate: ________ Exact answer: ________

🔢 Part 2: Multiplying by Multiples of Ten

Instructions: Use your knowledge of multiplication facts and place value patterns to solve these problems.

5. 0.7 × 10 = ________
6. 0.7 × 30

Think: 0.7 × 30 = 0.7 × (3 × 10)

Answer: ________

7. 0.9 × 20 = ________
8. 0.5 × 60 = ________

🚀 Part 3: Challenge Questions and Applications

9. A packet of biscuits costs $2.40. How much would 5 packets cost?
10. Challenge: Calculate 1.3 × 4

Hint: Think about 1.3 as 1 + 0.3

11. Thinking Question: Explain why 0.7 × 5 gives a smaller answer than 7 × 5. Use complete sentences.
12. Pattern Investigation: Complete this pattern and explain what you notice:

7 × 5 = ________

0.7 × 5 = ________

0.07 × 5 = ________

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