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Chapter 4: Problem 22

Perform the indicated operations. 1076 eight \(+2076_{\text {eight }}\)

Short Answer

Expert verified
When adding 1076 (base 8) and 2076 (base 8), the sum is \(3144_{\text{eight}}\).

Step by step solution

01

Write the numbers in columns

To start with, we should write both numbers in the column format, with the right-aligned ones place, eights place, and so on. ``` 1 0 7 6 + 2 0 7 6 ```
02

Add the numbers in the right-most column (ones place)

Add the numbers (6 + 6) in the right-most column, which is the ones place. In base 10, 6 + 6 is 12. Now, we need to find the equivalent of 12 in base 8. Divide 12 by 8 to get the quotient (1) and remainder (4). We write 4 in the ones place and carry over the quotient (1) to the next column. ``` 1 1 0 7 6 + 2 0 7 6 --------- 4 ```
03

Add the numbers in the eights place (including the carry-over)

Add the eights place numbers (0 + 0 + carry-over from the previous step) together. That's (0 + 0 + 1) = 1. Since 1 is already in base 8, we don't need to convert it. Write 1 in the eights place: ``` 1 1 0 7 6 + 2 0 7 6 --------- 1 4 ```
04

Add the numbers in the next place (sixty-fours place)

Add the numbers in the sixty-fours place (1 + 2) together. Since 1 + 2 = 3 and 3 is already in base 8, we don't need to convert it. Write 3 in the sixty-fours place: ``` 1 1 0 7 6 + 2 0 7 6 --------- 3 1 4 ``` There are no more numbers to add in the higher place values, so the sum is: \(3144_{\text{eight}}\). So, 1076 (in base 8) + 2076 (in base 8) = 3144 (in base 8).

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Number Systems
Number systems play a vital role in how we represent and manipulate numbers. They are a systematic way of expressing numbers using a set of digits. These systems include:
  • Decimal System (Base 10): The most common system, using digits 0 through 9.
  • Binary System (Base 2): Utilized in computing, using only the digits 0 and 1.
  • Octal System (Base 8): Uses digits 0 through 7, often applied in computing.
  • Hexadecimal System (Base 16): Employs digits 0 through 9, and letters A to F represent values 10 to 15, respectively.
Each number system is defined by its base, which signifies the number of unique digit symbols it uses. Understanding these different systems is crucial in fields like computer science and engineering, as they assist in various calculations and data representation tasks.
Base Conversion
Base conversion is the process of changing a number from one base to another. This skill is important because different number systems are suited for specific tasks.
  • From Decimal to Other Bases: Convert decimal numbers to bases like binary, octal, or hexadecimal by repeatedly dividing the number by the new base and noting the remainders.
  • From Other Bases to Decimal: Convert numbers from other bases to decimal by multiplying each digit by its base power and summing the results.
  • Between Non-Decimal Bases: Converts bases indirectly through the decimal system, or by using division and multiplication for direct conversion.
Converting numbers in this way allows for seamless interaction between different systems of computation. In octal arithmetic, mastering conversions enables smooth transitions back to the decimal system for easy interpretation.
Octal Arithmetic
Octal arithmetic involves performing mathematical operations using the base 8 number system. It functions similarly to decimal arithmetic but uses different rules due to its base.
  • Addition: When adding octal numbers, each digit is treated like a separate decimal, but sums that exceed 7 carry over to the next left position, similar to base 10.
  • Subtraction: Subtracting involves borrowing, with the same rule that values must not exceed 7.
  • Multiplication and Division: Multiplication and division are carried out similarly as in decimal, but results exceeding 7 need to be converted within the base 8 limitations.
Octal arithmetic simplifies calculations in many computing scenarios, as computers and digital systems often naturally align with base 8 processing. Adeptness at octal arithmetic is essential for working with certain types of digital electronics.
Discrete Mathematics
Discrete mathematics is a branch of mathematics dealing with discrete elements. It underpins various field applications, such as computer science and cryptography, due to its focus on countable and distinct objects.
  • Functions and Algorithms: Essential in developing processes for calculations and conversions in number systems.
  • Graph Theory and Logic: Aid in visualizing and deriving logical conclusions from complex data relationships.
  • Combinatorics and Set Theory: Facilitate advanced computation techniques and problem-solving skills for theoretical and practical applications, including number system conversion and arithmetic.
By employing the logical structure of discrete mathematics, we gain clearer insights into the fundamental operations involving different systems, such as octal addition. Such insights bolster the reasoning required for precise computations in various technological and scientific fields.

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Most popular questions from this chapter

Let \(A\) and \(B\) be two square matrices of order \(n\). Let \(c_{n}\) denote the number of comparisons needed to determine whether or not \(A \leq B\) Show that \(c_{n}=\mathrm{O}\left(n^{2}\right)\)

Let \(A\) be a square matrix of order \(n .\) Let \(s_{n}\) denote the number of swappings of elements needed to find the transpose \(A^{\mathrm{T}}\) of \(A .\) Show that the number of additions of two \(n\) -bit integers is \(\mathrm{O}(n).\)

The techniques explained in Exercises \(9-12\) are reversible; that is, the octal and hexadecimal representations of integers can be used to find their binary representations. For example, $$ 345_\mathrm{eight}=011100 \quad 101_{\mathrm{two}}=11100101_{\mathrm{two}} $$ Using this technique, rewrite each number in base two. $$ 237_{\text { eight }} $$

Express each decimal number as required. $$1776=(\quad)_{\text {eight }}$$

Find the number of times the statement \(x \leftarrow x+1\) is executed by each loop. $$ \begin{array}{c}{\text { for } 1=1 \text { to } n \text { do }} \\ {\text { for } j=1 \text { to } 1 \text { do }} \\ {x \leftarrow x+1}\end{array} $$
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