Express the fraction 1/4 as a binary fractional number (base-2 representation).
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A0.01
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B0.11
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C0.10
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D0.00
Answer
Correct Answer: 0.01
Explanation
Introduction:Binary fractions represent values to the right of the binary point using negative powers of 2. Converting a rational fraction such as 1/4 illustrates how place values work in base 2.
Given Data / Assumptions:
- Fraction to convert: 1/4.
- Binary fractional places represent 1/2, 1/4, 1/8, etc.
- No rounding required; 1/4 is exactly representable.
Concept / Approach:The first place to the right of the binary point is 2^-1 = 1/2, the second is 2^-2 = 1/4, the third is 2^-3 = 1/8, and so on. To represent 1/4 exactly, set the 2^-2 place to 1 and the others to 0.
Step-by-Step Solution:
List binary place values: 0.1 = 1/2, 0.01 = 1/4, 0.001 = 1/8.Identify 1/4 = 2^-2.Set only the 2^-2 position to 1.Binary representation: 0.01₂ = 1/4.Verification / Alternative check:Compute value of 0.01₂ = 0*(1/2) + 1*(1/4) = 1/4. Exact match, no remainder.
Why Other Options Are Wrong:
- 0.11 = 1/2 + 1/4 = 3/4.
- 0.10 = 1/2.
- 0.00 = 0.
Common Pitfalls:Misreading positions to the right of the point; remember each step halves the weight: 1/2, 1/4, 1/8, etc.
Final Answer:0.01