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How Much Interest Will It Earn? is a free printable Grade 3 to Grade 5 social studies worksheet on figuring out simple interest on savings, aligned to C3 Framework indicator D2.Eco.10.3-5. It prints 8 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

How Much Interest Will It Earn?

D2.Eco.10.3-5

NameDate

Choose the best answer. For math problems, choose the work that gives the right answer.

1.Why does money left in a savings account longer earn more interest?
  • A.Banks forget to charge fees
  • B.Interest is paid for each year the money stays
  • C.Old money is worth less
2.An account pays $5 a year for every $100 saved. The interest is paid out each year. How much interest does $400 earn in 2 years?
  • A.$400 ÷ $100 = 4; 4 × $5 = $20; 2 × $20 = $40
  • B.4 × $5 = $20
  • C.$400 + $5 = $405
3.A bank pays 5% interest a year, which is $5 for every $100. How much interest does $100 earn in a year?
  • A.$100 ÷ 5 = $20
  • B.$100 ÷ $100 = 1; 1 × $5 = $5
  • C.$100 + $5 = $105
4.Lena's $100 earns $5 interest in a year. She leaves it all in the account. How much does she have after one year?
  • A.$100 × 5 = $500
  • B.$100 − $5 = $95
  • C.$100 + $5 = $105
5.Carlos saves $200 in an account that pays $3 a year for every $100. How much interest does he earn in one year?
  • A.$3 × 100 = $300
  • B.$200 ÷ $100 = 2; 2 × $3 = $6
  • C.$200 + $3 = $203
6.$50 in a piggy bank earns $0. $50 in a savings account earns $1 a year. After 3 years, how much more is in the account?
  • A.$50 + $1 = $51
  • B.$50 × 3 = $150
  • C.3 × $1 = $3 more
7.A savings account pays $2 a year for every $100 saved. How much interest does $300 earn in one year?
  • A.$300 ÷ $100 = 3; 3 × $2 = $6
  • B.$300 + $2 = $302
  • C.$2 × 100 = $200
8.An account pays $1 a year for every $20 saved. How much interest does $80 earn in a year?
  • A.$80 − $20 = $60
  • B.$80 + $1 = $81
  • C.$80 ÷ $20 = 4; 4 × $1 = $4

LessonPrint · D2.Eco.10.3-5 · Set 6 · free to copy for classroom use

Answer key — How Much Interest Will It Earn?

Set 6. Prints on its own sheet.

  1. 1.Interest is paid for each year the money stays
  2. 2.$400 ÷ $100 = 4; 4 × $5 = $20; 2 × $20 = $40
  3. 3.$100 ÷ $100 = 1; 1 × $5 = $5
  4. 4.$100 + $5 = $105
  5. 5.$200 ÷ $100 = 2; 2 × $3 = $6
  6. 6.3 × $1 = $3 more
  7. 7.$300 ÷ $100 = 3; 3 × $2 = $6
  8. 8.$80 ÷ $20 = 4; 4 × $1 = $4

Last reviewed 2026-09-05. Aligned to D2.Eco.10.3-5 of the C3 Framework for Social Studies State Standards.