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. $1900 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$1900 · 6% · 2 · Simple interest & savings
2. $800 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$800 · 4% · 3 · Simple interest & savings
3. $1300 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$1300 · 2% · 4 · Simple interest & savings
4. $1500 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$1500 · 9% · 1 · Simple interest & savings
5. $1100 is invested at 7% simple interest per year for 3 years. How much simple interest is earned?
$1100 · 7% · 3 · Simple interest & savings
6. $700 is invested at 3% simple interest per year for 2 years. How much simple interest is earned?
$700 · 3% · 2 · Simple interest & savings
7. $200 is invested at 3% simple interest per year for 2 years. How much simple interest is earned?
$200 · 3% · 2 · Simple interest & savings
8. $900 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$900 · 4% · 2 · Simple interest & savings
9. $1600 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$1600 · 4% · 6 · Simple interest & savings
10. $1500 is invested at 10% simple interest per year for 3 years. How much simple interest is earned?
$1500 · 10% · 3 · Simple interest & savings
11. $1300 is invested at 7% simple interest per year for 2 years. How much simple interest is earned?
$1300 · 7% · 2 · Simple interest & savings
12. $1400 is invested at 3% simple interest per year for 5 years. How much simple interest is earned?
$1400 · 3% · 5 · Simple interest & savings

12 questions · Seed 59 · 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. $1900 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$228
Simple interest I = P × r × t = $1900 × 6% × 2 = $228.
2. $800 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$96
Simple interest I = P × r × t = $800 × 4% × 3 = $96.
3. $1300 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$104
Simple interest I = P × r × t = $1300 × 2% × 4 = $104.
4. $1500 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$135
Simple interest I = P × r × t = $1500 × 9% × 1 = $135.
5. $1100 is invested at 7% simple interest per year for 3 years. How much simple interest is earned?
$231
Simple interest I = P × r × t = $1100 × 7% × 3 = $231.
6. $700 is invested at 3% simple interest per year for 2 years. How much simple interest is earned?
$42
Simple interest I = P × r × t = $700 × 3% × 2 = $42.
7. $200 is invested at 3% simple interest per year for 2 years. How much simple interest is earned?
$12
Simple interest I = P × r × t = $200 × 3% × 2 = $12.
8. $900 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$72
Simple interest I = P × r × t = $900 × 4% × 2 = $72.
9. $1600 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$384
Simple interest I = P × r × t = $1600 × 4% × 6 = $384.
10. $1500 is invested at 10% simple interest per year for 3 years. How much simple interest is earned?
$450
Simple interest I = P × r × t = $1500 × 10% × 3 = $450.
11. $1300 is invested at 7% simple interest per year for 2 years. How much simple interest is earned?
$182
Simple interest I = P × r × t = $1300 × 7% × 2 = $182.
12. $1400 is invested at 3% simple interest per year for 5 years. How much simple interest is earned?
$210
Simple interest I = P × r × t = $1400 × 3% × 5 = $210.

12 questions · Seed 59 · Age guidance, not curriculum certification

Worksheet StudioPractice pack · Ages 16-18

Simple interest & savings

Take your time. Show your thinking.

1. $1900 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$1900 · 6% · 2 · Simple interest & savings
2. $800 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$800 · 4% · 3 · Simple interest & savings
3. $1300 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$1300 · 2% · 4 · Simple interest & savings
4. $1500 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$1500 · 9% · 1 · Simple interest & savings
5. $1100 is invested at 7% simple interest per year for 3 years. How much simple interest is earned?
$1100 · 7% · 3 · Simple interest & savings
6. $700 is invested at 3% simple interest per year for 2 years. How much simple interest is earned?
$700 · 3% · 2 · Simple interest & savings
7. $200 is invested at 3% simple interest per year for 2 years. How much simple interest is earned?
$200 · 3% · 2 · Simple interest & savings
8. $900 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$900 · 4% · 2 · Simple interest & savings
9. $1600 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$1600 · 4% · 6 · Simple interest & savings
10. $1500 is invested at 10% simple interest per year for 3 years. How much simple interest is earned?
$1500 · 10% · 3 · Simple interest & savings
11. $1300 is invested at 7% simple interest per year for 2 years. How much simple interest is earned?
$1300 · 7% · 2 · Simple interest & savings
12. $1400 is invested at 3% simple interest per year for 5 years. How much simple interest is earned?
$1400 · 3% · 5 · Simple interest & savings

12 questions · Seed 59 · Age guidance, not curriculum certification

Worksheet StudioAnswer key · Ages 16-18

Simple interest & savings

Answers and reasoning. Review before teaching.

1. $1900 is invested at 6% simple interest per year for 2 years. How much simple interest is earned?
$228
Simple interest I = P × r × t = $1900 × 6% × 2 = $228.
2. $800 is invested at 4% simple interest per year for 3 years. How much simple interest is earned?
$96
Simple interest I = P × r × t = $800 × 4% × 3 = $96.
3. $1300 is invested at 2% simple interest per year for 4 years. How much simple interest is earned?
$104
Simple interest I = P × r × t = $1300 × 2% × 4 = $104.
4. $1500 is invested at 9% simple interest per year for 1 year. How much simple interest is earned?
$135
Simple interest I = P × r × t = $1500 × 9% × 1 = $135.
5. $1100 is invested at 7% simple interest per year for 3 years. How much simple interest is earned?
$231
Simple interest I = P × r × t = $1100 × 7% × 3 = $231.
6. $700 is invested at 3% simple interest per year for 2 years. How much simple interest is earned?
$42
Simple interest I = P × r × t = $700 × 3% × 2 = $42.
7. $200 is invested at 3% simple interest per year for 2 years. How much simple interest is earned?
$12
Simple interest I = P × r × t = $200 × 3% × 2 = $12.
8. $900 is invested at 4% simple interest per year for 2 years. How much simple interest is earned?
$72
Simple interest I = P × r × t = $900 × 4% × 2 = $72.
9. $1600 is invested at 4% simple interest per year for 6 years. How much simple interest is earned?
$384
Simple interest I = P × r × t = $1600 × 4% × 6 = $384.
10. $1500 is invested at 10% simple interest per year for 3 years. How much simple interest is earned?
$450
Simple interest I = P × r × t = $1500 × 10% × 3 = $450.
11. $1300 is invested at 7% simple interest per year for 2 years. How much simple interest is earned?
$182
Simple interest I = P × r × t = $1300 × 7% × 2 = $182.
12. $1400 is invested at 3% simple interest per year for 5 years. How much simple interest is earned?
$210
Simple interest I = P × r × t = $1400 × 3% × 5 = $210.

12 questions · Seed 59 · Age guidance, not curriculum certification