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. $1900 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$1900 · 2% · 3 · Simple interest & savings
2. $400 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$400 · 6% · 2 · Simple interest & savings
3. $300 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$300 · 9% · 1 · Simple interest & savings
4. $1100 is invested at 7% simple interest per year for 4 years. How much simple interest is earned?
$1100 · 7% · 4 · Simple interest & savings
5. $500 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$500 · 5% · 5 · Simple interest & savings
6. $1000 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$1000 · 8% · 2 · Simple interest & savings
7. $900 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$900 · 10% · 4 · Simple interest & savings
8. $700 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$700 · 6% · 2 · Simple interest & savings
9. $1900 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$1900 · 4% · 3 · Simple interest & savings
10. $1600 is invested at 3% simple interest per year for 2 years. How much simple interest is earned?
$1600 · 3% · 2 · Simple interest & savings
11. $1400 is invested at 9% simple interest per year for 4 years. How much simple interest is earned?
$1400 · 9% · 4 · Simple interest & savings
12. $800 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$800 · 2% · 5 · Simple interest & savings

12 questions · Seed 104747 · 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. $1900 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$114
Simple interest I = P × r × t = $1900 × 2% × 3 = $114.
2. $400 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$48
Simple interest I = P × r × t = $400 × 6% × 2 = $48.
3. $300 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$27
Simple interest I = P × r × t = $300 × 9% × 1 = $27.
4. $1100 is invested at 7% simple interest per year for 4 years. How much simple interest is earned?
$308
Simple interest I = P × r × t = $1100 × 7% × 4 = $308.
5. $500 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$125
Simple interest I = P × r × t = $500 × 5% × 5 = $125.
6. $1000 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$160
Simple interest I = P × r × t = $1000 × 8% × 2 = $160.
7. $900 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$360
Simple interest I = P × r × t = $900 × 10% × 4 = $360.
8. $700 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$84
Simple interest I = P × r × t = $700 × 6% × 2 = $84.
9. $1900 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$228
Simple interest I = P × r × t = $1900 × 4% × 3 = $228.
10. $1600 is invested at 3% simple interest per year for 2 years. How much simple interest is earned?
$96
Simple interest I = P × r × t = $1600 × 3% × 2 = $96.
11. $1400 is invested at 9% simple interest per year for 4 years. How much simple interest is earned?
$504
Simple interest I = P × r × t = $1400 × 9% × 4 = $504.
12. $800 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$80
Simple interest I = P × r × t = $800 × 2% × 5 = $80.

12 questions · Seed 104747 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Simple interest & savings

Take your time. Show your thinking.

1. $1900 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$1900 · 2% · 3 · Simple interest & savings
2. $400 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$400 · 6% · 2 · Simple interest & savings
3. $300 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$300 · 9% · 1 · Simple interest & savings
4. $1100 is invested at 7% simple interest per year for 4 years. How much simple interest is earned?
$1100 · 7% · 4 · Simple interest & savings
5. $500 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$500 · 5% · 5 · Simple interest & savings
6. $1000 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$1000 · 8% · 2 · Simple interest & savings
7. $900 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$900 · 10% · 4 · Simple interest & savings
8. $700 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$700 · 6% · 2 · Simple interest & savings
9. $1900 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$1900 · 4% · 3 · Simple interest & savings
10. $1600 is invested at 3% simple interest per year for 2 years. How much simple interest is earned?
$1600 · 3% · 2 · Simple interest & savings
11. $1400 is invested at 9% simple interest per year for 4 years. How much simple interest is earned?
$1400 · 9% · 4 · Simple interest & savings
12. $800 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$800 · 2% · 5 · Simple interest & savings

12 questions · Seed 104747 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $1900 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$114
Simple interest I = P × r × t = $1900 × 2% × 3 = $114.
2. $400 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$48
Simple interest I = P × r × t = $400 × 6% × 2 = $48.
3. $300 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$27
Simple interest I = P × r × t = $300 × 9% × 1 = $27.
4. $1100 is invested at 7% simple interest per year for 4 years. How much simple interest is earned?
$308
Simple interest I = P × r × t = $1100 × 7% × 4 = $308.
5. $500 is invested at 5% simple interest per year for 5 years. How much simple interest is earned?
$125
Simple interest I = P × r × t = $500 × 5% × 5 = $125.
6. $1000 is invested at 8% simple interest per year for 2 years. How much simple interest is earned?
$160
Simple interest I = P × r × t = $1000 × 8% × 2 = $160.
7. $900 is invested at 10% simple interest per year for 4 years. How much simple interest is earned?
$360
Simple interest I = P × r × t = $900 × 10% × 4 = $360.
8. $700 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$84
Simple interest I = P × r × t = $700 × 6% × 2 = $84.
9. $1900 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$228
Simple interest I = P × r × t = $1900 × 4% × 3 = $228.
10. $1600 is invested at 3% simple interest per year for 2 years. How much simple interest is earned?
$96
Simple interest I = P × r × t = $1600 × 3% × 2 = $96.
11. $1400 is invested at 9% simple interest per year for 4 years. How much simple interest is earned?
$504
Simple interest I = P × r × t = $1400 × 9% × 4 = $504.
12. $800 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$80
Simple interest I = P × r × t = $800 × 2% × 5 = $80.

12 questions · Seed 104747 · Age guidance, not curriculum certification