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. $1100 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$1100 · 5% · 6 · Simple interest & savings
2. $2000 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$2000 · 4% · 1 · Simple interest & savings
3. $100 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$100 · 4% · 1 · Simple interest & savings
4. $600 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$600 · 2% · 5 · Simple interest & savings
5. $1400 is invested at 4% simple interest per year for 4 years. How much simple interest is earned?
$1400 · 4% · 4 · Simple interest & savings
6. $2000 is invested at 6% simple interest per year for 1 year. How much simple interest is earned?
$2000 · 6% · 1 · Simple interest & savings
7. $300 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$300 · 9% · 2 · Simple interest & savings
8. $1300 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$1300 · 2% · 2 · Simple interest & savings
9. $100 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$100 · 4% · 6 · Simple interest & savings
10. $800 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$800 · 8% · 4 · Simple interest & savings
11. $1900 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$1900 · 2% · 1 · Simple interest & savings
12. $1900 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$1900 · 2% · 5 · Simple interest & savings

12 questions · Seed 104741 · 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. $1100 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$330
Simple interest I = P × r × t = $1100 × 5% × 6 = $330.
2. $2000 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$80
Simple interest I = P × r × t = $2000 × 4% × 1 = $80.
3. $100 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$4
Simple interest I = P × r × t = $100 × 4% × 1 = $4.
4. $600 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$60
Simple interest I = P × r × t = $600 × 2% × 5 = $60.
5. $1400 is invested at 4% simple interest per year for 4 years. How much simple interest is earned?
$224
Simple interest I = P × r × t = $1400 × 4% × 4 = $224.
6. $2000 is invested at 6% simple interest per year for 1 year. How much simple interest is earned?
$120
Simple interest I = P × r × t = $2000 × 6% × 1 = $120.
7. $300 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$54
Simple interest I = P × r × t = $300 × 9% × 2 = $54.
8. $1300 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$52
Simple interest I = P × r × t = $1300 × 2% × 2 = $52.
9. $100 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$24
Simple interest I = P × r × t = $100 × 4% × 6 = $24.
10. $800 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$256
Simple interest I = P × r × t = $800 × 8% × 4 = $256.
11. $1900 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$38
Simple interest I = P × r × t = $1900 × 2% × 1 = $38.
12. $1900 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$190
Simple interest I = P × r × t = $1900 × 2% × 5 = $190.

12 questions · Seed 104741 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Simple interest & savings

Take your time. Show your thinking.

1. $1100 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$1100 · 5% · 6 · Simple interest & savings
2. $2000 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$2000 · 4% · 1 · Simple interest & savings
3. $100 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$100 · 4% · 1 · Simple interest & savings
4. $600 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$600 · 2% · 5 · Simple interest & savings
5. $1400 is invested at 4% simple interest per year for 4 years. How much simple interest is earned?
$1400 · 4% · 4 · Simple interest & savings
6. $2000 is invested at 6% simple interest per year for 1 year. How much simple interest is earned?
$2000 · 6% · 1 · Simple interest & savings
7. $300 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$300 · 9% · 2 · Simple interest & savings
8. $1300 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$1300 · 2% · 2 · Simple interest & savings
9. $100 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$100 · 4% · 6 · Simple interest & savings
10. $800 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$800 · 8% · 4 · Simple interest & savings
11. $1900 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$1900 · 2% · 1 · Simple interest & savings
12. $1900 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$1900 · 2% · 5 · Simple interest & savings

12 questions · Seed 104741 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $1100 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$330
Simple interest I = P × r × t = $1100 × 5% × 6 = $330.
2. $2000 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$80
Simple interest I = P × r × t = $2000 × 4% × 1 = $80.
3. $100 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$4
Simple interest I = P × r × t = $100 × 4% × 1 = $4.
4. $600 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$60
Simple interest I = P × r × t = $600 × 2% × 5 = $60.
5. $1400 is invested at 4% simple interest per year for 4 years. How much simple interest is earned?
$224
Simple interest I = P × r × t = $1400 × 4% × 4 = $224.
6. $2000 is invested at 6% simple interest per year for 1 year. How much simple interest is earned?
$120
Simple interest I = P × r × t = $2000 × 6% × 1 = $120.
7. $300 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$54
Simple interest I = P × r × t = $300 × 9% × 2 = $54.
8. $1300 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$52
Simple interest I = P × r × t = $1300 × 2% × 2 = $52.
9. $100 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$24
Simple interest I = P × r × t = $100 × 4% × 6 = $24.
10. $800 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$256
Simple interest I = P × r × t = $800 × 8% × 4 = $256.
11. $1900 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$38
Simple interest I = P × r × t = $1900 × 2% × 1 = $38.
12. $1900 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$190
Simple interest I = P × r × t = $1900 × 2% × 5 = $190.

12 questions · Seed 104741 · Age guidance, not curriculum certification