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. $600 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$600 · 8% · 2 · Simple interest & savings
2. $200 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$200 · 8% · 4 · Simple interest & savings
3. $1300 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$1300 · 9% · 2 · Simple interest & savings
4. $1500 is invested at 5% simple interest per year for 1 year. How much simple interest is earned?
$1500 · 5% · 1 · Simple interest & savings
5. $1300 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$1300 · 7% · 6 · Simple interest & savings
6. $500 is invested at 5% simple interest per year for 2 years. How much simple interest is earned?
$500 · 5% · 2 · Simple interest & savings
7. $1600 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$1600 · 10% · 4 · Simple interest & savings
8. $400 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$400 · 8% · 1 · Simple interest & savings
9. $2000 is invested at 6% simple interest per year for 5 years. How much simple interest is earned?
$2000 · 6% · 5 · Simple interest & savings
10. $300 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$300 · 10% · 4 · Simple interest & savings
11. $1600 is invested at 8% simple interest per year for 3 years. How much simple interest is earned?
$1600 · 8% · 3 · Simple interest & savings
12. $1500 is invested at 7% simple interest per year for 2 years. How much simple interest is earned?
$1500 · 7% · 2 · Simple interest & savings

12 questions · Seed 43 · 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. $600 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$96
Simple interest I = P × r × t = $600 × 8% × 2 = $96.
2. $200 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$64
Simple interest I = P × r × t = $200 × 8% × 4 = $64.
3. $1300 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$234
Simple interest I = P × r × t = $1300 × 9% × 2 = $234.
4. $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.
5. $1300 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$546
Simple interest I = P × r × t = $1300 × 7% × 6 = $546.
6. $500 is invested at 5% simple interest per year for 2 years. How much simple interest is earned?
$50
Simple interest I = P × r × t = $500 × 5% × 2 = $50.
7. $1600 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$640
Simple interest I = P × r × t = $1600 × 10% × 4 = $640.
8. $400 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$32
Simple interest I = P × r × t = $400 × 8% × 1 = $32.
9. $2000 is invested at 6% simple interest per year for 5 years. How much simple interest is earned?
$600
Simple interest I = P × r × t = $2000 × 6% × 5 = $600.
10. $300 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$120
Simple interest I = P × r × t = $300 × 10% × 4 = $120.
11. $1600 is invested at 8% simple interest per year for 3 years. How much simple interest is earned?
$384
Simple interest I = P × r × t = $1600 × 8% × 3 = $384.
12. $1500 is invested at 7% simple interest per year for 2 years. How much simple interest is earned?
$210
Simple interest I = P × r × t = $1500 × 7% × 2 = $210.

12 questions · Seed 43 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Simple interest & savings

Take your time. Show your thinking.

1. $600 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$600 · 8% · 2 · Simple interest & savings
2. $200 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$200 · 8% · 4 · Simple interest & savings
3. $1300 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$1300 · 9% · 2 · Simple interest & savings
4. $1500 is invested at 5% simple interest per year for 1 year. How much simple interest is earned?
$1500 · 5% · 1 · Simple interest & savings
5. $1300 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$1300 · 7% · 6 · Simple interest & savings
6. $500 is invested at 5% simple interest per year for 2 years. How much simple interest is earned?
$500 · 5% · 2 · Simple interest & savings
7. $1600 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$1600 · 10% · 4 · Simple interest & savings
8. $400 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$400 · 8% · 1 · Simple interest & savings
9. $2000 is invested at 6% simple interest per year for 5 years. How much simple interest is earned?
$2000 · 6% · 5 · Simple interest & savings
10. $300 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$300 · 10% · 4 · Simple interest & savings
11. $1600 is invested at 8% simple interest per year for 3 years. How much simple interest is earned?
$1600 · 8% · 3 · Simple interest & savings
12. $1500 is invested at 7% simple interest per year for 2 years. How much simple interest is earned?
$1500 · 7% · 2 · Simple interest & savings

12 questions · Seed 43 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $600 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$96
Simple interest I = P × r × t = $600 × 8% × 2 = $96.
2. $200 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$64
Simple interest I = P × r × t = $200 × 8% × 4 = $64.
3. $1300 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$234
Simple interest I = P × r × t = $1300 × 9% × 2 = $234.
4. $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.
5. $1300 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$546
Simple interest I = P × r × t = $1300 × 7% × 6 = $546.
6. $500 is invested at 5% simple interest per year for 2 years. How much simple interest is earned?
$50
Simple interest I = P × r × t = $500 × 5% × 2 = $50.
7. $1600 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$640
Simple interest I = P × r × t = $1600 × 10% × 4 = $640.
8. $400 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$32
Simple interest I = P × r × t = $400 × 8% × 1 = $32.
9. $2000 is invested at 6% simple interest per year for 5 years. How much simple interest is earned?
$600
Simple interest I = P × r × t = $2000 × 6% × 5 = $600.
10. $300 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$120
Simple interest I = P × r × t = $300 × 10% × 4 = $120.
11. $1600 is invested at 8% simple interest per year for 3 years. How much simple interest is earned?
$384
Simple interest I = P × r × t = $1600 × 8% × 3 = $384.
12. $1500 is invested at 7% simple interest per year for 2 years. How much simple interest is earned?
$210
Simple interest I = P × r × t = $1500 × 7% × 2 = $210.

12 questions · Seed 43 · Age guidance, not curriculum certification