Loans: how the rate and the length change the total cost

Answer Key - Grade 8 Math Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   Ari reads Mr. Lane's pretend loan for a used car: $7,500 borrowed at 4.5% simple interest a year for 3 years. What is the total repaid?

   $8,512.50
2. 2.

   Esme reads Mr. Grove's pretend loan for a truck: $10,000 borrowed at 3.5% simple interest a year for 5 years. What is the total repaid?

   $11,750
3. 3.

   Ms. Reyes's pretend car loan offer is $5,000 at 6% simple interest a year, for 3 years or 5 years. How much more interest does Jun find for the 5-year loan?

   $600
4. 4.

   Ms. Frost's pretend couch loan offer is $2,500 at 8% simple interest a year, for 2 years or 4 years. How much more interest does Luz find for the 4-year loan?

   $400
5. 5.

   Mr. Cole's pretend van loan offer is $9,000 at 5% simple interest a year, for 4 years or 6 years. How much more interest does Milo find for the 6-year loan?

   $900
6. 6.

   Ms. Shaw compares two pretend truck loans of $15,000 for 5 years, at 3% and at 5% simple interest a year. How much more interest does Pia find at 5%?

   $1,500
7. 7.

   Mr. Lane compares two pretend piano loans of $4,000 for 2 years, at 6% and at 9% simple interest a year. How much more interest does Ren find at 9%?

   $240
8. 8.

   Tala checks Ms. Hale's two pretend $5,000 car loans at simple interest. Loan A is 4% a year for 6 years; Loan B is 6% a year for 3 years. Which costs less to repay?

   • Loan B
   • Both cost the same
   • Loan A
9. 9.

   Zee checks Mr. Dunn's two pretend $8,000 truck loans at simple interest. Loan A is 5% a year for 3 years; Loan B is 3% a year for 4 years. Which costs less to repay?

   • Loan B
   • Loan A
   • Both cost the same
10. 10.

    Ari checks Ms. Reyes's two pretend $3,000 couch loans at simple interest. Loan A is 7% a year for 2 years; Loan B is 4% a year for 4 years. Which costs less to repay?

    • Both cost the same
    • Loan B
    • Loan A