Time & moneyAges 13-15

Simple interest & savings

Use I = Prt to calculate simple interest earned on a principal sum over a number of years. Review suitability for your learners before teaching.

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Worksheet StudioPractice pack · Ages 13-15

Simple interest & savings

Take your time. Show your thinking.

1. $200 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$200 · 6% · 4 · Simple interest & savings
2. $200 is invested at 5% simple interest per year for 4 years. How much simple interest is earned?
$200 · 5% · 4 · Simple interest & savings
3. $1300 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$1300 · 8% · 2 · Simple interest & savings
4. $800 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$800 · 10% · 5 · Simple interest & savings
5. $300 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$300 · 5% · 5 · Simple interest & savings
6. $1200 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$1200 · 2% · 1 · Simple interest & savings
7. $1500 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$1500 · 10% · 4 · Simple interest & savings
8. $1700 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$1700 · 9% · 1 · Simple interest & savings
9. $1000 is invested at 5% simple interest per year for 2 years. How much simple interest is earned?
$1000 · 5% · 2 · Simple interest & savings
10. $1500 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$1500 · 10% · 5 · Simple interest & savings
11. $600 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$600 · 5% · 6 · Simple interest & savings
12. $1200 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$1200 · 4% · 1 · Simple interest & savings

12 questions · Seed 104748 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 13-15

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $200 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$48
Simple interest I = P × r × t = $200 × 6% × 4 = $48.
2. $200 is invested at 5% simple interest per year for 4 years. How much simple interest is earned?
$40
Simple interest I = P × r × t = $200 × 5% × 4 = $40.
3. $1300 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$208
Simple interest I = P × r × t = $1300 × 8% × 2 = $208.
4. $800 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$400
Simple interest I = P × r × t = $800 × 10% × 5 = $400.
5. $300 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$75
Simple interest I = P × r × t = $300 × 5% × 5 = $75.
6. $1200 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$24
Simple interest I = P × r × t = $1200 × 2% × 1 = $24.
7. $1500 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$600
Simple interest I = P × r × t = $1500 × 10% × 4 = $600.
8. $1700 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$153
Simple interest I = P × r × t = $1700 × 9% × 1 = $153.
9. $1000 is invested at 5% simple interest per year for 2 years. How much simple interest is earned?
$100
Simple interest I = P × r × t = $1000 × 5% × 2 = $100.
10. $1500 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$750
Simple interest I = P × r × t = $1500 × 10% × 5 = $750.
11. $600 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$180
Simple interest I = P × r × t = $600 × 5% × 6 = $180.
12. $1200 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$48
Simple interest I = P × r × t = $1200 × 4% × 1 = $48.

12 questions · Seed 104748 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Simple interest & savings

Take your time. Show your thinking.

1. $200 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$200 · 6% · 4 · Simple interest & savings
2. $200 is invested at 5% simple interest per year for 4 years. How much simple interest is earned?
$200 · 5% · 4 · Simple interest & savings
3. $1300 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$1300 · 8% · 2 · Simple interest & savings
4. $800 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$800 · 10% · 5 · Simple interest & savings
5. $300 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$300 · 5% · 5 · Simple interest & savings
6. $1200 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$1200 · 2% · 1 · Simple interest & savings
7. $1500 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$1500 · 10% · 4 · Simple interest & savings
8. $1700 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$1700 · 9% · 1 · Simple interest & savings
9. $1000 is invested at 5% simple interest per year for 2 years. How much simple interest is earned?
$1000 · 5% · 2 · Simple interest & savings
10. $1500 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$1500 · 10% · 5 · Simple interest & savings
11. $600 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$600 · 5% · 6 · Simple interest & savings
12. $1200 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$1200 · 4% · 1 · Simple interest & savings

12 questions · Seed 104748 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $200 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$48
Simple interest I = P × r × t = $200 × 6% × 4 = $48.
2. $200 is invested at 5% simple interest per year for 4 years. How much simple interest is earned?
$40
Simple interest I = P × r × t = $200 × 5% × 4 = $40.
3. $1300 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$208
Simple interest I = P × r × t = $1300 × 8% × 2 = $208.
4. $800 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$400
Simple interest I = P × r × t = $800 × 10% × 5 = $400.
5. $300 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$75
Simple interest I = P × r × t = $300 × 5% × 5 = $75.
6. $1200 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$24
Simple interest I = P × r × t = $1200 × 2% × 1 = $24.
7. $1500 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$600
Simple interest I = P × r × t = $1500 × 10% × 4 = $600.
8. $1700 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$153
Simple interest I = P × r × t = $1700 × 9% × 1 = $153.
9. $1000 is invested at 5% simple interest per year for 2 years. How much simple interest is earned?
$100
Simple interest I = P × r × t = $1000 × 5% × 2 = $100.
10. $1500 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$750
Simple interest I = P × r × t = $1500 × 10% × 5 = $750.
11. $600 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$180
Simple interest I = P × r × t = $600 × 5% × 6 = $180.
12. $1200 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$48
Simple interest I = P × r × t = $1200 × 4% × 1 = $48.

12 questions · Seed 104748 · Age guidance, not curriculum certification