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. $2000 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$2000 · 2% · 2 · Simple interest & savings
2. $100 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$100 · 8% · 6 · Simple interest & savings
3. $1000 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$1000 · 2% · 5 · Simple interest & savings
4. $500 is invested at 2% simple interest per year for 6 years. How much simple interest is earned?
$500 · 2% · 6 · Simple interest & savings
5. $1400 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$1400 · 5% · 6 · Simple interest & savings
6. $900 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$900 · 5% · 6 · Simple interest & savings
7. $1500 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$1500 · 5% · 6 · Simple interest & savings
8. $1500 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$1500 · 6% · 6 · Simple interest & savings
9. $400 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$400 · 6% · 4 · Simple interest & savings
10. $1000 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$1000 · 6% · 4 · Simple interest & savings
11. $700 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$700 · 8% · 6 · Simple interest & savings
12. $1800 is invested at 3% simple interest per year for 4 years. How much simple interest is earned?
$1800 · 3% · 4 · Simple interest & savings

12 questions · Seed 50 · 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. $2000 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$80
Simple interest I = P × r × t = $2000 × 2% × 2 = $80.
2. $100 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$48
Simple interest I = P × r × t = $100 × 8% × 6 = $48.
3. $1000 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$100
Simple interest I = P × r × t = $1000 × 2% × 5 = $100.
4. $500 is invested at 2% simple interest per year for 6 years. How much simple interest is earned?
$60
Simple interest I = P × r × t = $500 × 2% × 6 = $60.
5. $1400 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$420
Simple interest I = P × r × t = $1400 × 5% × 6 = $420.
6. $900 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$270
Simple interest I = P × r × t = $900 × 5% × 6 = $270.
7. $1500 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$450
Simple interest I = P × r × t = $1500 × 5% × 6 = $450.
8. $1500 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$540
Simple interest I = P × r × t = $1500 × 6% × 6 = $540.
9. $400 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$96
Simple interest I = P × r × t = $400 × 6% × 4 = $96.
10. $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.
11. $700 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$336
Simple interest I = P × r × t = $700 × 8% × 6 = $336.
12. $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.

12 questions · Seed 50 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 13-15

Simple interest & savings

Take your time. Show your thinking.

1. $2000 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$2000 · 2% · 2 · Simple interest & savings
2. $100 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$100 · 8% · 6 · Simple interest & savings
3. $1000 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$1000 · 2% · 5 · Simple interest & savings
4. $500 is invested at 2% simple interest per year for 6 years. How much simple interest is earned?
$500 · 2% · 6 · Simple interest & savings
5. $1400 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$1400 · 5% · 6 · Simple interest & savings
6. $900 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$900 · 5% · 6 · Simple interest & savings
7. $1500 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$1500 · 5% · 6 · Simple interest & savings
8. $1500 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$1500 · 6% · 6 · Simple interest & savings
9. $400 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$400 · 6% · 4 · Simple interest & savings
10. $1000 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$1000 · 6% · 4 · Simple interest & savings
11. $700 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$700 · 8% · 6 · Simple interest & savings
12. $1800 is invested at 3% simple interest per year for 4 years. How much simple interest is earned?
$1800 · 3% · 4 · Simple interest & savings

12 questions · Seed 50 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 13-15

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $2000 is invested at 2% simple interest per year for 2 years. How much simple interest is earned?
$80
Simple interest I = P × r × t = $2000 × 2% × 2 = $80.
2. $100 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$48
Simple interest I = P × r × t = $100 × 8% × 6 = $48.
3. $1000 is invested at 2% simple interest per year for 5 years. How much simple interest is earned?
$100
Simple interest I = P × r × t = $1000 × 2% × 5 = $100.
4. $500 is invested at 2% simple interest per year for 6 years. How much simple interest is earned?
$60
Simple interest I = P × r × t = $500 × 2% × 6 = $60.
5. $1400 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$420
Simple interest I = P × r × t = $1400 × 5% × 6 = $420.
6. $900 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$270
Simple interest I = P × r × t = $900 × 5% × 6 = $270.
7. $1500 is invested at 5% simple interest per year for 6 years. How much simple interest is earned?
$450
Simple interest I = P × r × t = $1500 × 5% × 6 = $450.
8. $1500 is invested at 6% simple interest per year for 6 years. How much simple interest is earned?
$540
Simple interest I = P × r × t = $1500 × 6% × 6 = $540.
9. $400 is invested at 6% simple interest per year for 4 years. How much simple interest is earned?
$96
Simple interest I = P × r × t = $400 × 6% × 4 = $96.
10. $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.
11. $700 is invested at 8% simple interest per year for 6 years. How much simple interest is earned?
$336
Simple interest I = P × r × t = $700 × 8% × 6 = $336.
12. $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.

12 questions · Seed 50 · Age guidance, not curriculum certification