Chapter 7: Problem 91
Write as a decimal. $$\frac{1}{8}$$
Short Answer
Expert verified
The fraction \( \frac{1}{8} \) as a decimal is 0.125.
Step by step solution
01
Understand the Fraction
The fraction \( \frac{1}{8} \) represents the division of 1 by 8. To convert this fraction into a decimal, we need to perform this division.
02
Setup the Division
Set up the division problem by placing 1 (the numerator) inside the division bracket and 8 (the denominator) outside of it. You will be dividing 1 by 8.
03
Perform the Division
Since 1 is less than 8, we write 0 as the whole number part of the decimal. Place a decimal point and add zeros to the right of it to continue the division. Start dividing by seeing how many times 8 fits into 10, then continue with the next digits.
- 8 goes into 10 once (1.0), which leaves a remainder of 2.
- Add another 0 making it 20. 8 goes into 20 two times (1.25), leaving a remainder of 4.
- Add another 0 making it 40. 8 goes into 40 five times (1.125), with no remainder.
04
Confirm the Decimal
The division is now complete. The result shows that \( \frac{1}{8} = 0.125 \). The decimal representation is 0.125.
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Fraction Division
In mathematics, division of fractions plays a crucial part in simplifying and finding decimal representations. When you see a fraction like \( \frac{1}{8} \), it can be understood as a division problem. The numerator, 1, is divided by the denominator, 8.
- In this process, the numerator is often referred to as the 'dividend' or the number to be divided.
- The denominator acts as the 'divisor,' or the number you are dividing by.
Decimal Representation
A decimal representation allows numbers to be written in base-10 notation, which is the most common system used in everyday arithmetic. Unlike fractions, where parts of a whole are expressed as one number over another, decimals express these parts in a linear format that follows the decimal point.
- For instance, the fraction \( \frac{1}{8} \) results in the decimal 0.125.
- This number is read as "zero point one-two-five," clearly conveying the fraction in a more immediately recognizable form.
Long Division Process
The long division process is a systematic method for dividing larger numbers or obtaining decimal values from fractions. With fractions, long division ensures a step-by-step approach to calculate the decimal representation.To start the division of \( \frac{1}{8} \), we set up the division where 1 is inside the division bracket, showing it's the number to be divided.- Since 1 is smaller than 8, we start by acknowledging that 8 goes into 1, zero times.- To proceed further, zeros are added after a decimal point to allow for continued division, turning the dividend into numbers like 10, 20, and 40 sequentially.Understanding terms like 'dividend', 'divisor', and 'quotient'—which is the resulting number—is crucial:
- The quotient tells us how many times the divisor fits into the dividend.
- When the division is complete, the quotient becomes the decimal equivalent of the fraction.