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. $1300 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$1300 · 5% · 3 · Simple interest & savings
2. $400 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$400 · 6% · 6 · Simple interest & savings
3. $100 is invested at 7% simple interest per year for 5 years. How much simple interest is earned?
$100 · 7% · 5 · Simple interest & savings
4. $100 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$100 · 4% · 2 · Simple interest & savings
5. $1600 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$1600 · 6% · 3 · Simple interest & savings
6. $1200 is invested at 10% simple interest per year for 6 years. How much simple interest is earned?
$1200 · 10% · 6 · Simple interest & savings
7. $500 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$500 · 9% · 2 · Simple interest & savings
8. $1300 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$1300 · 6% · 4 · Simple interest & savings
9. $300 is invested at 3% simple interest per year for 6 years. How much simple interest is earned?
$300 · 3% · 6 · Simple interest & savings
10. $300 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$300 · 5% · 6 · Simple interest & savings
11. $500 is invested at 7% simple interest per year for 1 year. How much simple interest is earned?
$500 · 7% · 1 · Simple interest & savings
12. $1800 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$1800 · 8% · 4 · Simple interest & savings

12 questions · Seed 104749 · 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. $1300 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$195
Simple interest I = P × r × t = $1300 × 5% × 3 = $195.
2. $400 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$144
Simple interest I = P × r × t = $400 × 6% × 6 = $144.
3. $100 is invested at 7% simple interest per year for 5 years. How much simple interest is earned?
$35
Simple interest I = P × r × t = $100 × 7% × 5 = $35.
4. $100 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$8
Simple interest I = P × r × t = $100 × 4% × 2 = $8.
5. $1600 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$288
Simple interest I = P × r × t = $1600 × 6% × 3 = $288.
6. $1200 is invested at 10% simple interest per year for 6 years. How much simple interest is earned?
$720
Simple interest I = P × r × t = $1200 × 10% × 6 = $720.
7. $500 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$90
Simple interest I = P × r × t = $500 × 9% × 2 = $90.
8. $1300 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$312
Simple interest I = P × r × t = $1300 × 6% × 4 = $312.
9. $300 is invested at 3% simple interest per year for 6 years. How much simple interest is earned?
$54
Simple interest I = P × r × t = $300 × 3% × 6 = $54.
10. $300 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$90
Simple interest I = P × r × t = $300 × 5% × 6 = $90.
11. $500 is invested at 7% simple interest per year for 1 year. How much simple interest is earned?
$35
Simple interest I = P × r × t = $500 × 7% × 1 = $35.
12. $1800 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$576
Simple interest I = P × r × t = $1800 × 8% × 4 = $576.

12 questions · Seed 104749 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Simple interest & savings

Take your time. Show your thinking.

1. $1300 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$1300 · 5% · 3 · Simple interest & savings
2. $400 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$400 · 6% · 6 · Simple interest & savings
3. $100 is invested at 7% simple interest per year for 5 years. How much simple interest is earned?
$100 · 7% · 5 · Simple interest & savings
4. $100 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$100 · 4% · 2 · Simple interest & savings
5. $1600 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$1600 · 6% · 3 · Simple interest & savings
6. $1200 is invested at 10% simple interest per year for 6 years. How much simple interest is earned?
$1200 · 10% · 6 · Simple interest & savings
7. $500 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$500 · 9% · 2 · Simple interest & savings
8. $1300 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$1300 · 6% · 4 · Simple interest & savings
9. $300 is invested at 3% simple interest per year for 6 years. How much simple interest is earned?
$300 · 3% · 6 · Simple interest & savings
10. $300 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$300 · 5% · 6 · Simple interest & savings
11. $500 is invested at 7% simple interest per year for 1 year. How much simple interest is earned?
$500 · 7% · 1 · Simple interest & savings
12. $1800 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$1800 · 8% · 4 · Simple interest & savings

12 questions · Seed 104749 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $1300 is invested at 5% simple interest per year for 3 years. How much simple interest is earned?
$195
Simple interest I = P × r × t = $1300 × 5% × 3 = $195.
2. $400 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$144
Simple interest I = P × r × t = $400 × 6% × 6 = $144.
3. $100 is invested at 7% simple interest per year for 5 years. How much simple interest is earned?
$35
Simple interest I = P × r × t = $100 × 7% × 5 = $35.
4. $100 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$8
Simple interest I = P × r × t = $100 × 4% × 2 = $8.
5. $1600 is invested at 6% simple interest per year for 3 years. How much simple interest is earned?
$288
Simple interest I = P × r × t = $1600 × 6% × 3 = $288.
6. $1200 is invested at 10% simple interest per year for 6 years. How much simple interest is earned?
$720
Simple interest I = P × r × t = $1200 × 10% × 6 = $720.
7. $500 is invested at 9% simple interest per year for 2 years. How much simple interest is earned?
$90
Simple interest I = P × r × t = $500 × 9% × 2 = $90.
8. $1300 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$312
Simple interest I = P × r × t = $1300 × 6% × 4 = $312.
9. $300 is invested at 3% simple interest per year for 6 years. How much simple interest is earned?
$54
Simple interest I = P × r × t = $300 × 3% × 6 = $54.
10. $300 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$90
Simple interest I = P × r × t = $300 × 5% × 6 = $90.
11. $500 is invested at 7% simple interest per year for 1 year. How much simple interest is earned?
$35
Simple interest I = P × r × t = $500 × 7% × 1 = $35.
12. $1800 is invested at 8% simple interest per year for 4 years. How much simple interest is earned?
$576
Simple interest I = P × r × t = $1800 × 8% × 4 = $576.

12 questions · Seed 104749 · Age guidance, not curriculum certification