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. $1500 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$1500 · 8% · 2 · Simple interest & savings
2. $1200 is invested at 8% simple interest per year for 5 years. How much simple interest is earned?
$1200 · 8% · 5 · Simple interest & savings
3. $1600 is invested at 10% simple interest per year for 3 years. How much simple interest is earned?
$1600 · 10% · 3 · Simple interest & savings
4. $200 is invested at 2% simple interest per year for 6 years. How much simple interest is earned?
$200 · 2% · 6 · Simple interest & savings
5. $1000 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$1000 · 10% · 5 · Simple interest & savings
6. $1200 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$1200 · 6% · 3 · Simple interest & savings
7. $1200 is invested at 9% simple interest per year for 5 years. How much simple interest is earned?
$1200 · 9% · 5 · Simple interest & savings
8. $400 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$400 · 4% · 2 · Simple interest & savings
9. $1000 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$1000 · 4% · 1 · Simple interest & savings
10. $1200 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$1200 · 2% · 1 · Simple interest & savings
11. $1500 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$1500 · 4% · 3 · Simple interest & savings
12. $1100 is invested at 9% simple interest per year for 3 years. How much simple interest is earned?
$1100 · 9% · 3 · Simple interest & savings

12 questions · Seed 104746 · 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. $1500 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$240
Simple interest I = P × r × t = $1500 × 8% × 2 = $240.
2. $1200 is invested at 8% simple interest per year for 5 years. How much simple interest is earned?
$480
Simple interest I = P × r × t = $1200 × 8% × 5 = $480.
3. $1600 is invested at 10% simple interest per year for 3 years. How much simple interest is earned?
$480
Simple interest I = P × r × t = $1600 × 10% × 3 = $480.
4. $200 is invested at 2% simple interest per year for 6 years. How much simple interest is earned?
$24
Simple interest I = P × r × t = $200 × 2% × 6 = $24.
5. $1000 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$500
Simple interest I = P × r × t = $1000 × 10% × 5 = $500.
6. $1200 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$216
Simple interest I = P × r × t = $1200 × 6% × 3 = $216.
7. $1200 is invested at 9% simple interest per year for 5 years. How much simple interest is earned?
$540
Simple interest I = P × r × t = $1200 × 9% × 5 = $540.
8. $400 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$32
Simple interest I = P × r × t = $400 × 4% × 2 = $32.
9. $1000 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$40
Simple interest I = P × r × t = $1000 × 4% × 1 = $40.
10. $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.
11. $1500 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$180
Simple interest I = P × r × t = $1500 × 4% × 3 = $180.
12. $1100 is invested at 9% simple interest per year for 3 years. How much simple interest is earned?
$297
Simple interest I = P × r × t = $1100 × 9% × 3 = $297.

12 questions · Seed 104746 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Simple interest & savings

Take your time. Show your thinking.

1. $1500 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$1500 · 8% · 2 · Simple interest & savings
2. $1200 is invested at 8% simple interest per year for 5 years. How much simple interest is earned?
$1200 · 8% · 5 · Simple interest & savings
3. $1600 is invested at 10% simple interest per year for 3 years. How much simple interest is earned?
$1600 · 10% · 3 · Simple interest & savings
4. $200 is invested at 2% simple interest per year for 6 years. How much simple interest is earned?
$200 · 2% · 6 · Simple interest & savings
5. $1000 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$1000 · 10% · 5 · Simple interest & savings
6. $1200 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$1200 · 6% · 3 · Simple interest & savings
7. $1200 is invested at 9% simple interest per year for 5 years. How much simple interest is earned?
$1200 · 9% · 5 · Simple interest & savings
8. $400 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$400 · 4% · 2 · Simple interest & savings
9. $1000 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$1000 · 4% · 1 · Simple interest & savings
10. $1200 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$1200 · 2% · 1 · Simple interest & savings
11. $1500 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$1500 · 4% · 3 · Simple interest & savings
12. $1100 is invested at 9% simple interest per year for 3 years. How much simple interest is earned?
$1100 · 9% · 3 · Simple interest & savings

12 questions · Seed 104746 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $1500 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$240
Simple interest I = P × r × t = $1500 × 8% × 2 = $240.
2. $1200 is invested at 8% simple interest per year for 5 years. How much simple interest is earned?
$480
Simple interest I = P × r × t = $1200 × 8% × 5 = $480.
3. $1600 is invested at 10% simple interest per year for 3 years. How much simple interest is earned?
$480
Simple interest I = P × r × t = $1600 × 10% × 3 = $480.
4. $200 is invested at 2% simple interest per year for 6 years. How much simple interest is earned?
$24
Simple interest I = P × r × t = $200 × 2% × 6 = $24.
5. $1000 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$500
Simple interest I = P × r × t = $1000 × 10% × 5 = $500.
6. $1200 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$216
Simple interest I = P × r × t = $1200 × 6% × 3 = $216.
7. $1200 is invested at 9% simple interest per year for 5 years. How much simple interest is earned?
$540
Simple interest I = P × r × t = $1200 × 9% × 5 = $540.
8. $400 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$32
Simple interest I = P × r × t = $400 × 4% × 2 = $32.
9. $1000 is invested at 4% simple interest per year for 1 year. How much simple interest is earned?
$40
Simple interest I = P × r × t = $1000 × 4% × 1 = $40.
10. $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.
11. $1500 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$180
Simple interest I = P × r × t = $1500 × 4% × 3 = $180.
12. $1100 is invested at 9% simple interest per year for 3 years. How much simple interest is earned?
$297
Simple interest I = P × r × t = $1100 × 9% × 3 = $297.

12 questions · Seed 104746 · Age guidance, not curriculum certification