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8th grade Turn a repeating decimal into a fraction worksheet

6 printable versionsBuilding Confidence10 questions · answer keyFree · no account

Level: Building Confidence · On Level · Challenge Me

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Turn a repeating decimal into a fraction

Grade 8 Math Worksheet - Building Confidence

NameDate

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

  1. Ari reads a repeating decimal on a calculator. The figure subtracts the lines to cancel the repeat. In simplest form, what fraction is x?

  2. Bo copies a repeating decimal into a notebook. The figure subtracts the lines to cancel the repeat. In simplest form, what fraction is x?

  3. Read this first

    Use this

    Strip of the digits: 0.[2] [2] [2] ... Lines: x = 0.222... and 10x = 2.222.... Subtract: 10x - x = 2.

  4. Esme sees a repeating decimal on a robot's screen. The figure subtracts the lines to cancel the repeat. In simplest form, what fraction is x?

  5. Jun finds a repeating decimal in a math book. The figure subtracts the lines to cancel the repeat. In simplest form, what fraction is x?

  6. Luz checks a repeating decimal on a quiz card. The figure subtracts the lines to cancel the repeat. In simplest form, what fraction is x?

  7. Strip of the digits: 0.[36] [36] ... Lines: x = 0.3636... and 100x = 36.3636.... Pia notes a repeating decimal for a puzzle. The block has 2 digits, so the figure slides the point 2 digits. In simplest form, what fraction is x?

  8. Ren types a repeating decimal into a spreadsheet. The block has 1 digit, so the figure slides the point 1 digit. In simplest form, what fraction is x?

  9. Zee reads a repeating decimal on a quiz. The block has 2 digits, so the figure slides the point 2 digits. In simplest form, what fraction is x?

  10. Ari copies a repeating decimal from the board. The block has 2 digits, so the figure slides the point 2 digits. In simplest form, what fraction is x?

  11. Strip of the digits: 0.[21] [21] ... Lines: x = 0.2121... and 100x = 21.2121.... Bo finds a repeating decimal on a worksheet. The block has 2 digits, so the figure slides the point 2 digits. In simplest form, what fraction is x?

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8th grade Turn a repeating decimal into a fraction worksheet – printable
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About this worksheet

Turn a repeating decimal into a fraction. Every version has 10 questions, and the answer key prints on the second page.

What your child will learn

  • I can write a repeating decimal like 0.4545… as a fraction in simplest form: 5/11.
  • I can say why the answer needs a subtraction: x and 100x have the same repeat, so it cancels.
  • I can handle a whole part (2.333…), digits in front (0.1666…), and a string of nines (0.999… = 1).

Standard: 8.NS.A.1 (decimal expansions: repeating decimals are rational)

Words to know

repeating decimal: A decimal with a block of digits that repeats forever, like 0.4545….

block: The digits that repeat: in 0.4545… the block is 45.

front digits: Digits between the point and the block: in 0.1666… the front digit is 1.

cancel: Subtract two lines whose repeats match, and the repeat disappears.

simplest form: A fraction whose top and bottom share no factor other than 1.

Common mistakes

Your child read a repeating decimal as if it ended, for example 0.45 repeating as 45/100.

Your child used the wrong number of nines on the bottom.

Your child left the front digits out of a decimal like 0.1666….

What to say

Ask: does 0.4545… stop after the 45, or does it keep going?

Ask: how many digits repeat? That many nines go under the block.

Ask: which digits come before the repeat, and are they part of the number?

Questions parents ask

What is the most common mistake with turn a repeating decimal into a fraction?

Your child read a repeating decimal as if it ended, for example 0.45 repeating as 45/100.

How can I help my child with turn a repeating decimal into a fraction?

Ask: does 0.4545… stop after the 45, or does it keep going?

Are these 8th grade math worksheets free to print?

Yes. All 6 printable versions at each level are free to print, with the answer key, and no account is needed.

More grade 8 math

See all grade 8 math

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