Time & moneyAges 16-18

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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Age band:Ages 13-15 Ages 16-18

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Worksheet StudioPractice pack · Ages 16-18

Simple interest & savings

Take your time. Show your thinking.

1. $100 is invested at 9% simple interest per year for 6 years. How much simple interest is earned?
$100 · 9% · 6 · Simple interest & savings
2. $700 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$700 · 6% · 6 · Simple interest & savings
3. $400 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$400 · 5% · 6 · Simple interest & savings
4. $1100 is invested at 3% simple interest per year for 6 years. How much simple interest is earned?
$1100 · 3% · 6 · Simple interest & savings
5. $500 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$500 · 2% · 2 · Simple interest & savings
6. $1100 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$1100 · 8% · 4 · Simple interest & savings
7. $2000 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$2000 · 2% · 4 · Simple interest & savings
8. $200 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$200 · 5% · 5 · Simple interest & savings
9. $1600 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$1600 · 9% · 2 · Simple interest & savings
10. $200 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$200 · 2% · 5 · Simple interest & savings
11. $600 is invested at 6% simple interest per year for 5 years. How much simple interest is earned?
$600 · 6% · 5 · Simple interest & savings
12. $600 is invested at 8% simple interest per year for 5 years. How much simple interest is earned?
$600 · 8% · 5 · Simple interest & savings

12 questions · Seed 104740 · Age guidance, not curriculum certification

View the answer key

Worksheet StudioAnswer key · Ages 16-18

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $100 is invested at 9% simple interest per year for 6 years. How much simple interest is earned?
$54
Simple interest I = P × r × t = $100 × 9% × 6 = $54.
2. $700 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$252
Simple interest I = P × r × t = $700 × 6% × 6 = $252.
3. $400 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$120
Simple interest I = P × r × t = $400 × 5% × 6 = $120.
4. $1100 is invested at 3% simple interest per year for 6 years. How much simple interest is earned?
$198
Simple interest I = P × r × t = $1100 × 3% × 6 = $198.
5. $500 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$20
Simple interest I = P × r × t = $500 × 2% × 2 = $20.
6. $1100 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$352
Simple interest I = P × r × t = $1100 × 8% × 4 = $352.
7. $2000 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$160
Simple interest I = P × r × t = $2000 × 2% × 4 = $160.
8. $200 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$50
Simple interest I = P × r × t = $200 × 5% × 5 = $50.
9. $1600 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$288
Simple interest I = P × r × t = $1600 × 9% × 2 = $288.
10. $200 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$20
Simple interest I = P × r × t = $200 × 2% × 5 = $20.
11. $600 is invested at 6% simple interest per year for 5 years. How much simple interest is earned?
$180
Simple interest I = P × r × t = $600 × 6% × 5 = $180.
12. $600 is invested at 8% simple interest per year for 5 years. How much simple interest is earned?
$240
Simple interest I = P × r × t = $600 × 8% × 5 = $240.

12 questions · Seed 104740 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Simple interest & savings

Take your time. Show your thinking.

1. $100 is invested at 9% simple interest per year for 6 years. How much simple interest is earned?
$100 · 9% · 6 · Simple interest & savings
2. $700 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$700 · 6% · 6 · Simple interest & savings
3. $400 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$400 · 5% · 6 · Simple interest & savings
4. $1100 is invested at 3% simple interest per year for 6 years. How much simple interest is earned?
$1100 · 3% · 6 · Simple interest & savings
5. $500 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$500 · 2% · 2 · Simple interest & savings
6. $1100 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$1100 · 8% · 4 · Simple interest & savings
7. $2000 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$2000 · 2% · 4 · Simple interest & savings
8. $200 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$200 · 5% · 5 · Simple interest & savings
9. $1600 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$1600 · 9% · 2 · Simple interest & savings
10. $200 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$200 · 2% · 5 · Simple interest & savings
11. $600 is invested at 6% simple interest per year for 5 years. How much simple interest is earned?
$600 · 6% · 5 · Simple interest & savings
12. $600 is invested at 8% simple interest per year for 5 years. How much simple interest is earned?
$600 · 8% · 5 · Simple interest & savings

12 questions · Seed 104740 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $100 is invested at 9% simple interest per year for 6 years. How much simple interest is earned?
$54
Simple interest I = P × r × t = $100 × 9% × 6 = $54.
2. $700 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$252
Simple interest I = P × r × t = $700 × 6% × 6 = $252.
3. $400 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$120
Simple interest I = P × r × t = $400 × 5% × 6 = $120.
4. $1100 is invested at 3% simple interest per year for 6 years. How much simple interest is earned?
$198
Simple interest I = P × r × t = $1100 × 3% × 6 = $198.
5. $500 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$20
Simple interest I = P × r × t = $500 × 2% × 2 = $20.
6. $1100 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$352
Simple interest I = P × r × t = $1100 × 8% × 4 = $352.
7. $2000 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$160
Simple interest I = P × r × t = $2000 × 2% × 4 = $160.
8. $200 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$50
Simple interest I = P × r × t = $200 × 5% × 5 = $50.
9. $1600 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$288
Simple interest I = P × r × t = $1600 × 9% × 2 = $288.
10. $200 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$20
Simple interest I = P × r × t = $200 × 2% × 5 = $20.
11. $600 is invested at 6% simple interest per year for 5 years. How much simple interest is earned?
$180
Simple interest I = P × r × t = $600 × 6% × 5 = $180.
12. $600 is invested at 8% simple interest per year for 5 years. How much simple interest is earned?
$240
Simple interest I = P × r × t = $600 × 8% × 5 = $240.

12 questions · Seed 104740 · Age guidance, not curriculum certification