🧮 Part 1: Multiplication and Division

1. Calculate 2.4 × 6

2. Calculate 8.1 ÷ 3

3. A packet of biscuits costs $3.45. How much do 4 packets cost?

4. Sarah runs 12.6 kilometres in total over 3 days, covering the same distance each day. How far does she run each day?

🎯 Part 2: Estimation and Checking

5. Before calculating 4.7 × 8, estimate the answer by rounding:

4.7 rounds to _____, so the estimate is _____ × 8 = _____

Now calculate the exact answer: _____________

6. Which calculation is most reasonable? Circle your answer.

0.9 × 5 = 45

0.9 × 5 = 4.5

0.9 × 5 = 0.45

7. Estimate first, then calculate 15.6 ÷ 4:

Estimate: _____ ÷ 4 = _____

Exact answer: _____________

8. Check if this answer is reasonable. Explain your thinking.

Problem: 3.2 × 7 = 224

9. A recipe calls for 1.25 kilograms of flour. If you want to make the recipe 3 times, how much flour do you need?

10. Tom has $24.60 to buy pencils that cost $1.50 each. How many pencils can he buy?

11. Explain in your own words how estimation helps you check if your decimal calculations are correct.