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JSS2: COMPUTER STUDIES - 1ST TERM

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  1. Computer Software | Week 1
    4 Topics
    |
    1 Quiz
  2. Operating System | Week 2
    9 Topics
    |
    1 Quiz
  3. Computer Memory: Primary And Secondary Memory | Week 3
    5 Topics
    |
    1 Quiz
  4. Computer Memory II: Secondary Memory (Backing Storage) | Week 4
    2 Topics
    |
    1 Quiz
  5. Number System I | Week 5
    4 Topics
    |
    1 Quiz
  6. Number System II | Week 6
    3 Topics
    |
    1 Quiz
  7. Units of Storage In Computer | Week 7
    2 Topics
    |
    1 Quiz
  8. Problem Solving Skills With Computer | Week 8
    5 Topics
    |
    1 Quiz
  9. Computer Programming Languages | Week 9
    3 Topics
    |
    1 Quiz



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Topic Content:

  • Binary Addition
  • Rules of Binary Addition
  • Worked Examples

Binary addition is much like your normal everyday addition (decimal addition), except that it carries on a value of 2 instead of a value of 10. For example: in decimal addition, if you add 8 + 2 you get ten, which you write as 10; in the sum, this gives a digit 0 and a carry of 1.

Rules of Binary Addition:

There are four rules of binary addition.

The rules of binary addition are as follows:

  • 0 + 0 = 0.
  • 0 + 1 = 1.
  • 1 + 0 = 1.
  • 1 + 1 = 0 with a carry of 1. 

In the fourth case, a binary addition is creating a sum of (1 + 1 = 1 0) i.e. 0 is written in the given column and a carry of 1 over to the next column.

We can also apply a simple trick by dividing the base number with the sum total, writing down the remainder and carrying the result of the division.

Example, add 1 + 1 in binary

sum total ⇒1 + 1 = 2

divide the sum by the base number, i.e. 2.

⇒ 2 ÷ 2 = 1 remainder 0

So in this example, we write down 0 and carry 1.

∴ Answer = 10

Screenshot 2023 08 14 at 08.22.51

Below are some worked binary addition examples:

Solve the following:

(a) 111two + 100two
(b)  1111two + 110two
(c) 10two + 10two
(d) 100two + 100two
(e) 111101two + 1001two

 

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