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. $1600 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$1600 · 7% · 6 · Simple interest & savings
2. $400 is invested at 10% simple interest per year for 3 years. How much simple interest is earned?
$400 · 10% · 3 · Simple interest & savings
3. $1500 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$1500 · 7% · 6 · Simple interest & savings
4. $200 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$200 · 8% · 6 · Simple interest & savings
5. $1600 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$1600 · 2% · 2 · Simple interest & savings
6. $1600 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$1600 · 6% · 2 · Simple interest & savings
7. $200 is invested at 9% simple interest per year for 3 years. How much simple interest is earned?
$200 · 9% · 3 · Simple interest & savings
8. $500 is invested at 9% simple interest per year for 5 years. How much simple interest is earned?
$500 · 9% · 5 · Simple interest & savings
9. $200 is invested at 10% simple interest per year for 6 years. How much simple interest is earned?
$200 · 10% · 6 · Simple interest & savings
10. $200 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$200 · 4% · 6 · Simple interest & savings
11. $1200 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$1200 · 5% · 3 · Simple interest & savings
12. $100 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$100 · 6% · 6 · Simple interest & savings

12 questions · Seed 104750 · 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. $1600 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$672
Simple interest I = P × r × t = $1600 × 7% × 6 = $672.
2. $400 is invested at 10% simple interest per year for 3 years. How much simple interest is earned?
$120
Simple interest I = P × r × t = $400 × 10% × 3 = $120.
3. $1500 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$630
Simple interest I = P × r × t = $1500 × 7% × 6 = $630.
4. $200 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$96
Simple interest I = P × r × t = $200 × 8% × 6 = $96.
5. $1600 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$64
Simple interest I = P × r × t = $1600 × 2% × 2 = $64.
6. $1600 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$192
Simple interest I = P × r × t = $1600 × 6% × 2 = $192.
7. $200 is invested at 9% simple interest per year for 3 years. How much simple interest is earned?
$54
Simple interest I = P × r × t = $200 × 9% × 3 = $54.
8. $500 is invested at 9% simple interest per year for 5 years. How much simple interest is earned?
$225
Simple interest I = P × r × t = $500 × 9% × 5 = $225.
9. $200 is invested at 10% simple interest per year for 6 years. How much simple interest is earned?
$120
Simple interest I = P × r × t = $200 × 10% × 6 = $120.
10. $200 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$48
Simple interest I = P × r × t = $200 × 4% × 6 = $48.
11. $1200 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$180
Simple interest I = P × r × t = $1200 × 5% × 3 = $180.
12. $100 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$36
Simple interest I = P × r × t = $100 × 6% × 6 = $36.

12 questions · Seed 104750 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Simple interest & savings

Take your time. Show your thinking.

1. $1600 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$1600 · 7% · 6 · Simple interest & savings
2. $400 is invested at 10% simple interest per year for 3 years. How much simple interest is earned?
$400 · 10% · 3 · Simple interest & savings
3. $1500 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$1500 · 7% · 6 · Simple interest & savings
4. $200 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$200 · 8% · 6 · Simple interest & savings
5. $1600 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$1600 · 2% · 2 · Simple interest & savings
6. $1600 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$1600 · 6% · 2 · Simple interest & savings
7. $200 is invested at 9% simple interest per year for 3 years. How much simple interest is earned?
$200 · 9% · 3 · Simple interest & savings
8. $500 is invested at 9% simple interest per year for 5 years. How much simple interest is earned?
$500 · 9% · 5 · Simple interest & savings
9. $200 is invested at 10% simple interest per year for 6 years. How much simple interest is earned?
$200 · 10% · 6 · Simple interest & savings
10. $200 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$200 · 4% · 6 · Simple interest & savings
11. $1200 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$1200 · 5% · 3 · Simple interest & savings
12. $100 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$100 · 6% · 6 · Simple interest & savings

12 questions · Seed 104750 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $1600 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$672
Simple interest I = P × r × t = $1600 × 7% × 6 = $672.
2. $400 is invested at 10% simple interest per year for 3 years. How much simple interest is earned?
$120
Simple interest I = P × r × t = $400 × 10% × 3 = $120.
3. $1500 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$630
Simple interest I = P × r × t = $1500 × 7% × 6 = $630.
4. $200 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$96
Simple interest I = P × r × t = $200 × 8% × 6 = $96.
5. $1600 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$64
Simple interest I = P × r × t = $1600 × 2% × 2 = $64.
6. $1600 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$192
Simple interest I = P × r × t = $1600 × 6% × 2 = $192.
7. $200 is invested at 9% simple interest per year for 3 years. How much simple interest is earned?
$54
Simple interest I = P × r × t = $200 × 9% × 3 = $54.
8. $500 is invested at 9% simple interest per year for 5 years. How much simple interest is earned?
$225
Simple interest I = P × r × t = $500 × 9% × 5 = $225.
9. $200 is invested at 10% simple interest per year for 6 years. How much simple interest is earned?
$120
Simple interest I = P × r × t = $200 × 10% × 6 = $120.
10. $200 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$48
Simple interest I = P × r × t = $200 × 4% × 6 = $48.
11. $1200 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$180
Simple interest I = P × r × t = $1200 × 5% × 3 = $180.
12. $100 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$36
Simple interest I = P × r × t = $100 × 6% × 6 = $36.

12 questions · Seed 104750 · Age guidance, not curriculum certification