💰 Part 1: Calculating Change

Instructions: Calculate the change from a $10 note. Show your working using the vertical column method.

1. Purchase: $3.75, Payment: $10.00

Change: $ __________

2. Purchase: $6.89, Payment: $10.00

Change: $ __________

3. Purchase: $9.05, Payment: $10.00

Change: $ __________

4. Purchase: $2.48, Payment: $10.00

Change: $ __________

🧮 Part 2: Decimal Subtraction Problems

Instructions: Solve these decimal subtraction problems. Remember to align the decimal points!

5. 15.67 - 8.29 = __________

6. 20.50 - 13.75 = __________

7. 12.00 - 7.83 = __________

8. 25.40 - 16.95 = __________

9. Before calculating 18.73 - 9.48, estimate the answer by rounding to the nearest whole number:

Estimation: _______ - _______ = _______

Now calculate the exact answer:

Exact answer: __________

10. Circle the most reasonable answer for 14.60 - 8.75 without calculating:

About $2.00

About $6.00

About $12.00

About $23.00

11. Explain how estimation helps you check if your decimal subtraction answer is reasonable: