Writing a fraction as a repeating decimal

Khan Academy
11 Jun 201304:06

Summary

TLDRThe video script demonstrates the process of converting the fraction 29/37 into a decimal. The presenter explains that since 29 is less than 37, the result will be less than 1. They proceed with a step-by-step long division, illustrating how to place the decimal and handle the zeros. The division shows a repeating pattern of '783', leading to the conclusion that 29/37 is approximately 0.783 repeating.

Takeaways

  • 🔱 The process involves converting the fraction 29/37 into a decimal.
  • 📉 The presenter acknowledges that the decimal will be less than 1 since 29 is less than 37.
  • 📝 The division starts with placing the decimal point and adding zeros to the dividend as needed.
  • 🔄 A trial-and-error method is used to determine how many times 37 goes into the dividend.
  • 🧼 The presenter demonstrates the division step by step, starting with 37 going into 290 seven times.
  • 💡 The division reveals a pattern where the digits 783 repeat indefinitely.
  • 🔁 The repeating pattern is indicated by placing a bar over the digits 783.
  • 📖 The final result of the division is expressed as a repeating decimal: 0.783783783

  • 🕒 The presenter notes that the problem is tedious due to the repetitive nature of the division.
  • 📋 The process is shown to be methodical and systematic, emphasizing the importance of patience in long division.

Q & A

  • What is the process described in the transcript?

    -The process described in the transcript is the long division method to convert the fraction 29/37 into a decimal.

  • Why is it stated that the result will be less than 1?

    -The result will be less than 1 because the numerator (29) is less than the denominator (37), indicating that the fraction represents a value less than one whole.

  • What is the initial step taken in the long division process?

    -The initial step is to place the decimal point and add zeros after the 29 to facilitate the division by 37.

  • How does the division process begin?

    -The division begins by determining how many times 37 goes into 290, which is found to be 7 times.

  • What is the first non-zero digit in the decimal part of the result?

    -The first non-zero digit in the decimal part of the result is 7, as 37 goes into 290 seven times.

  • What is the remainder after the first subtraction in the division?

    -The remainder after the first subtraction is 31, which is obtained after subtracting 259 (7 times 37) from 290.

  • How does the division process continue after the first subtraction?

    -The process continues by bringing down another zero to make 310 and then determining how many times 37 goes into 310, which is found to be 8 times.

  • What pattern is observed in the division process?

    -A repeating pattern of the digits 783 is observed in the division process, indicating that the decimal will be a repeating decimal.

  • How is the repeating decimal represented in the transcript?

    -The repeating decimal is represented by placing a line over the digits 783 to indicate that they repeat indefinitely.

  • What is the final decimal representation of 29/37 mentioned in the transcript?

    -The final decimal representation of 29/37 mentioned in the transcript is 0.783 repeating.

  • Why is the process described as tedious?

    -The process is described as tedious because it involves multiple steps of division, subtraction, and bringing down zeros, which is repetitive and can be time-consuming.

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Étiquettes Connexes
MathematicsDecimal ConversionLong DivisionEducational ContentRecurring DecimalMath TutorialFraction to DecimalNumber TheoryCalculation ProcessEducational Video
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