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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Age band:Ages 13-15 Ages 16-18

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Worksheet StudioPractice pack · Ages 13-15

Simple interest & savings

Take your time. Show your thinking.

1. $1400 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$1400 · 4% · 2 · Simple interest & savings
2. $800 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$800 · 6% · 6 · Simple interest & savings
3. $2000 is invested at 7% simple interest per year for 5 years. How much simple interest is earned?
$2000 · 7% · 5 · Simple interest & savings
4. $100 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$100 · 9% · 2 · Simple interest & savings
5. $1100 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$1100 · 2% · 2 · Simple interest & savings
6. $200 is invested at 3% simple interest per year for 5 years. How much simple interest is earned?
$200 · 3% · 5 · Simple interest & savings
7. $500 is invested at 7% simple interest per year for 3 years. How much simple interest is earned?
$500 · 7% · 3 · Simple interest & savings
8. $1500 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$1500 · 2% · 3 · Simple interest & savings
9. $1400 is invested at 6% simple interest per year for 1 year. How much simple interest is earned?
$1400 · 6% · 1 · Simple interest & savings
10. $700 is invested at 10% simple interest per year for 1 year. How much simple interest is earned?
$700 · 10% · 1 · Simple interest & savings
11. $1900 is invested at 10% simple interest per year for 2 years. How much simple interest is earned?
$1900 · 10% · 2 · Simple interest & savings
12. $1400 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$1400 · 2% · 3 · Simple interest & savings

12 questions · Seed 104733 · 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. $1400 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$112
Simple interest I = P × r × t = $1400 × 4% × 2 = $112.
2. $800 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$288
Simple interest I = P × r × t = $800 × 6% × 6 = $288.
3. $2000 is invested at 7% simple interest per year for 5 years. How much simple interest is earned?
$700
Simple interest I = P × r × t = $2000 × 7% × 5 = $700.
4. $100 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$18
Simple interest I = P × r × t = $100 × 9% × 2 = $18.
5. $1100 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$44
Simple interest I = P × r × t = $1100 × 2% × 2 = $44.
6. $200 is invested at 3% simple interest per year for 5 years. How much simple interest is earned?
$30
Simple interest I = P × r × t = $200 × 3% × 5 = $30.
7. $500 is invested at 7% simple interest per year for 3 years. How much simple interest is earned?
$105
Simple interest I = P × r × t = $500 × 7% × 3 = $105.
8. $1500 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$90
Simple interest I = P × r × t = $1500 × 2% × 3 = $90.
9. $1400 is invested at 6% simple interest per year for 1 year. How much simple interest is earned?
$84
Simple interest I = P × r × t = $1400 × 6% × 1 = $84.
10. $700 is invested at 10% simple interest per year for 1 year. How much simple interest is earned?
$70
Simple interest I = P × r × t = $700 × 10% × 1 = $70.
11. $1900 is invested at 10% simple interest per year for 2 years. How much simple interest is earned?
$380
Simple interest I = P × r × t = $1900 × 10% × 2 = $380.
12. $1400 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$84
Simple interest I = P × r × t = $1400 × 2% × 3 = $84.

12 questions · Seed 104733 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Simple interest & savings

Take your time. Show your thinking.

1. $1400 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$1400 · 4% · 2 · Simple interest & savings
2. $800 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$800 · 6% · 6 · Simple interest & savings
3. $2000 is invested at 7% simple interest per year for 5 years. How much simple interest is earned?
$2000 · 7% · 5 · Simple interest & savings
4. $100 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$100 · 9% · 2 · Simple interest & savings
5. $1100 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$1100 · 2% · 2 · Simple interest & savings
6. $200 is invested at 3% simple interest per year for 5 years. How much simple interest is earned?
$200 · 3% · 5 · Simple interest & savings
7. $500 is invested at 7% simple interest per year for 3 years. How much simple interest is earned?
$500 · 7% · 3 · Simple interest & savings
8. $1500 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$1500 · 2% · 3 · Simple interest & savings
9. $1400 is invested at 6% simple interest per year for 1 year. How much simple interest is earned?
$1400 · 6% · 1 · Simple interest & savings
10. $700 is invested at 10% simple interest per year for 1 year. How much simple interest is earned?
$700 · 10% · 1 · Simple interest & savings
11. $1900 is invested at 10% simple interest per year for 2 years. How much simple interest is earned?
$1900 · 10% · 2 · Simple interest & savings
12. $1400 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$1400 · 2% · 3 · Simple interest & savings

12 questions · Seed 104733 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $1400 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$112
Simple interest I = P × r × t = $1400 × 4% × 2 = $112.
2. $800 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$288
Simple interest I = P × r × t = $800 × 6% × 6 = $288.
3. $2000 is invested at 7% simple interest per year for 5 years. How much simple interest is earned?
$700
Simple interest I = P × r × t = $2000 × 7% × 5 = $700.
4. $100 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$18
Simple interest I = P × r × t = $100 × 9% × 2 = $18.
5. $1100 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$44
Simple interest I = P × r × t = $1100 × 2% × 2 = $44.
6. $200 is invested at 3% simple interest per year for 5 years. How much simple interest is earned?
$30
Simple interest I = P × r × t = $200 × 3% × 5 = $30.
7. $500 is invested at 7% simple interest per year for 3 years. How much simple interest is earned?
$105
Simple interest I = P × r × t = $500 × 7% × 3 = $105.
8. $1500 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$90
Simple interest I = P × r × t = $1500 × 2% × 3 = $90.
9. $1400 is invested at 6% simple interest per year for 1 year. How much simple interest is earned?
$84
Simple interest I = P × r × t = $1400 × 6% × 1 = $84.
10. $700 is invested at 10% simple interest per year for 1 year. How much simple interest is earned?
$70
Simple interest I = P × r × t = $700 × 10% × 1 = $70.
11. $1900 is invested at 10% simple interest per year for 2 years. How much simple interest is earned?
$380
Simple interest I = P × r × t = $1900 × 10% × 2 = $380.
12. $1400 is invested at 2% simple interest per year for 3 years. How much simple interest is earned?
$84
Simple interest I = P × r × t = $1400 × 2% × 3 = $84.

12 questions · Seed 104733 · Age guidance, not curriculum certification