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. $1300 is invested at 7% simple interest per year for 1 year. How much simple interest is earned?
$1300 · 7% · 1 · Simple interest & savings
2. $200 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$200 · 10% · 5 · Simple interest & savings
3. $1800 is invested at 3% simple interest per year for 4 years. How much simple interest is earned?
$1800 · 3% · 4 · Simple interest & savings
4. $1000 is invested at 6% simple interest per year for 5 years. How much simple interest is earned?
$1000 · 6% · 5 · Simple interest & savings
5. $1700 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$1700 · 10% · 5 · Simple interest & savings
6. $1200 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$1200 · 7% · 6 · Simple interest & savings
7. $1000 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$1000 · 6% · 4 · Simple interest & savings
8. $1400 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$1400 · 8% · 1 · Simple interest & savings
9. $600 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$600 · 2% · 1 · Simple interest & savings
10. $1100 is invested at 7% simple interest per year for 5 years. How much simple interest is earned?
$1100 · 7% · 5 · Simple interest & savings
11. $1000 is invested at 8% simple interest per year for 5 years. How much simple interest is earned?
$1000 · 8% · 5 · Simple interest & savings
12. $300 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$300 · 8% · 6 · Simple interest & savings

12 questions · Seed 104752 · 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. $1300 is invested at 7% simple interest per year for 1 year. How much simple interest is earned?
$91
Simple interest I = P × r × t = $1300 × 7% × 1 = $91.
2. $200 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$100
Simple interest I = P × r × t = $200 × 10% × 5 = $100.
3. $1800 is invested at 3% simple interest per year for 4 years. How much simple interest is earned?
$216
Simple interest I = P × r × t = $1800 × 3% × 4 = $216.
4. $1000 is invested at 6% simple interest per year for 5 years. How much simple interest is earned?
$300
Simple interest I = P × r × t = $1000 × 6% × 5 = $300.
5. $1700 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$850
Simple interest I = P × r × t = $1700 × 10% × 5 = $850.
6. $1200 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$504
Simple interest I = P × r × t = $1200 × 7% × 6 = $504.
7. $1000 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$240
Simple interest I = P × r × t = $1000 × 6% × 4 = $240.
8. $1400 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$112
Simple interest I = P × r × t = $1400 × 8% × 1 = $112.
9. $600 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$12
Simple interest I = P × r × t = $600 × 2% × 1 = $12.
10. $1100 is invested at 7% simple interest per year for 5 years. How much simple interest is earned?
$385
Simple interest I = P × r × t = $1100 × 7% × 5 = $385.
11. $1000 is invested at 8% simple interest per year for 5 years. How much simple interest is earned?
$400
Simple interest I = P × r × t = $1000 × 8% × 5 = $400.
12. $300 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$144
Simple interest I = P × r × t = $300 × 8% × 6 = $144.

12 questions · Seed 104752 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Simple interest & savings

Take your time. Show your thinking.

1. $1300 is invested at 7% simple interest per year for 1 year. How much simple interest is earned?
$1300 · 7% · 1 · Simple interest & savings
2. $200 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$200 · 10% · 5 · Simple interest & savings
3. $1800 is invested at 3% simple interest per year for 4 years. How much simple interest is earned?
$1800 · 3% · 4 · Simple interest & savings
4. $1000 is invested at 6% simple interest per year for 5 years. How much simple interest is earned?
$1000 · 6% · 5 · Simple interest & savings
5. $1700 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$1700 · 10% · 5 · Simple interest & savings
6. $1200 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$1200 · 7% · 6 · Simple interest & savings
7. $1000 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$1000 · 6% · 4 · Simple interest & savings
8. $1400 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$1400 · 8% · 1 · Simple interest & savings
9. $600 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$600 · 2% · 1 · Simple interest & savings
10. $1100 is invested at 7% simple interest per year for 5 years. How much simple interest is earned?
$1100 · 7% · 5 · Simple interest & savings
11. $1000 is invested at 8% simple interest per year for 5 years. How much simple interest is earned?
$1000 · 8% · 5 · Simple interest & savings
12. $300 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$300 · 8% · 6 · Simple interest & savings

12 questions · Seed 104752 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $1300 is invested at 7% simple interest per year for 1 year. How much simple interest is earned?
$91
Simple interest I = P × r × t = $1300 × 7% × 1 = $91.
2. $200 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$100
Simple interest I = P × r × t = $200 × 10% × 5 = $100.
3. $1800 is invested at 3% simple interest per year for 4 years. How much simple interest is earned?
$216
Simple interest I = P × r × t = $1800 × 3% × 4 = $216.
4. $1000 is invested at 6% simple interest per year for 5 years. How much simple interest is earned?
$300
Simple interest I = P × r × t = $1000 × 6% × 5 = $300.
5. $1700 is invested at 10% simple interest per year for 5 years. How much simple interest is earned?
$850
Simple interest I = P × r × t = $1700 × 10% × 5 = $850.
6. $1200 is invested at 7% simple interest per year for 6 years. How much simple interest is earned?
$504
Simple interest I = P × r × t = $1200 × 7% × 6 = $504.
7. $1000 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$240
Simple interest I = P × r × t = $1000 × 6% × 4 = $240.
8. $1400 is invested at 8% simple interest per year for 1 year. How much simple interest is earned?
$112
Simple interest I = P × r × t = $1400 × 8% × 1 = $112.
9. $600 is invested at 2% simple interest per year for 1 year. How much simple interest is earned?
$12
Simple interest I = P × r × t = $600 × 2% × 1 = $12.
10. $1100 is invested at 7% simple interest per year for 5 years. How much simple interest is earned?
$385
Simple interest I = P × r × t = $1100 × 7% × 5 = $385.
11. $1000 is invested at 8% simple interest per year for 5 years. How much simple interest is earned?
$400
Simple interest I = P × r × t = $1000 × 8% × 5 = $400.
12. $300 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$144
Simple interest I = P × r × t = $300 × 8% × 6 = $144.

12 questions · Seed 104752 · Age guidance, not curriculum certification