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. $700 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$700 · 6% · 3 · Simple interest & savings
2. $1900 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$1900 · 8% · 6 · Simple interest & savings
3. $1500 is invested at 5% simple interest per year for 1 year. How much simple interest is earned?
$1500 · 5% · 1 · Simple interest & savings
4. $1000 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$1000 · 2% · 3 · Simple interest & savings
5. $1400 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$1400 · 5% · 3 · Simple interest & savings
6. $1000 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$1000 · 2% · 5 · Simple interest & savings
7. $800 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$800 · 5% · 3 · Simple interest & savings
8. $700 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$700 · 8% · 1 · Simple interest & savings
9. $1000 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$1000 · 7% · 6 · Simple interest & savings
10. $100 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$100 · 4% · 6 · Simple interest & savings
11. $1200 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$1200 · 2% · 4 · Simple interest & savings
12. $1700 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$1700 · 2% · 1 · Simple interest & savings

12 questions · Seed 104729 · 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. $700 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$126
Simple interest I = P × r × t = $700 × 6% × 3 = $126.
2. $1900 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$912
Simple interest I = P × r × t = $1900 × 8% × 6 = $912.
3. $1500 is invested at 5% simple interest per year for 1 year. How much simple interest is earned?
$75
Simple interest I = P × r × t = $1500 × 5% × 1 = $75.
4. $1000 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$60
Simple interest I = P × r × t = $1000 × 2% × 3 = $60.
5. $1400 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$210
Simple interest I = P × r × t = $1400 × 5% × 3 = $210.
6. $1000 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$100
Simple interest I = P × r × t = $1000 × 2% × 5 = $100.
7. $800 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$120
Simple interest I = P × r × t = $800 × 5% × 3 = $120.
8. $700 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$56
Simple interest I = P × r × t = $700 × 8% × 1 = $56.
9. $1000 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$420
Simple interest I = P × r × t = $1000 × 7% × 6 = $420.
10. $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.
11. $1200 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$96
Simple interest I = P × r × t = $1200 × 2% × 4 = $96.
12. $1700 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$34
Simple interest I = P × r × t = $1700 × 2% × 1 = $34.

12 questions · Seed 104729 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Simple interest & savings

Take your time. Show your thinking.

1. $700 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$700 · 6% · 3 · Simple interest & savings
2. $1900 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$1900 · 8% · 6 · Simple interest & savings
3. $1500 is invested at 5% simple interest per year for 1 year. How much simple interest is earned?
$1500 · 5% · 1 · Simple interest & savings
4. $1000 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$1000 · 2% · 3 · Simple interest & savings
5. $1400 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$1400 · 5% · 3 · Simple interest & savings
6. $1000 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$1000 · 2% · 5 · Simple interest & savings
7. $800 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$800 · 5% · 3 · Simple interest & savings
8. $700 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$700 · 8% · 1 · Simple interest & savings
9. $1000 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$1000 · 7% · 6 · Simple interest & savings
10. $100 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$100 · 4% · 6 · Simple interest & savings
11. $1200 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$1200 · 2% · 4 · Simple interest & savings
12. $1700 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$1700 · 2% · 1 · Simple interest & savings

12 questions · Seed 104729 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $700 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$126
Simple interest I = P × r × t = $700 × 6% × 3 = $126.
2. $1900 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$912
Simple interest I = P × r × t = $1900 × 8% × 6 = $912.
3. $1500 is invested at 5% simple interest per year for 1 year. How much simple interest is earned?
$75
Simple interest I = P × r × t = $1500 × 5% × 1 = $75.
4. $1000 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$60
Simple interest I = P × r × t = $1000 × 2% × 3 = $60.
5. $1400 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$210
Simple interest I = P × r × t = $1400 × 5% × 3 = $210.
6. $1000 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$100
Simple interest I = P × r × t = $1000 × 2% × 5 = $100.
7. $800 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$120
Simple interest I = P × r × t = $800 × 5% × 3 = $120.
8. $700 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$56
Simple interest I = P × r × t = $700 × 8% × 1 = $56.
9. $1000 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$420
Simple interest I = P × r × t = $1000 × 7% × 6 = $420.
10. $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.
11. $1200 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$96
Simple interest I = P × r × t = $1200 × 2% × 4 = $96.
12. $1700 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$34
Simple interest I = P × r × t = $1700 × 2% × 1 = $34.

12 questions · Seed 104729 · Age guidance, not curriculum certification