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Multiplying binary numbers - how the calculation works

The binary system is also called the "dual system" because it can only contain 1s and 0s. In order to calculate with the numbers, it is first important to convert the numbers. Besides the preceding conversion into decimal numbers, you can multiply the binary numbers by a little trick without much effort.

Multiplying binary numbers: These rules must be followed

The good news is, the previously known multiplication rules also apply to binary numbers. So you don't have to do anything more than reapply the rules you learned. To make it clearer, go through the following examples:
  1. In classical multiplication, one number is taken times the other number, and this gives the factor.
  2. For binary numbers, the calculation is even simpler in this case, since multiplication is only done by a 0 or a 1.
  3. So let's take 1 times 1 gives 1.
  4. 0 times 1 gives 0, just like 1 times 0 also gives 0.
  5. Wichtig ist nur, dass die einzelnen Ergebnisse anschließend untereinander addiert werden.
  6. Es kann durchaus vorkommen, dass bei der Addition eine 2 das Ergebnis ist.
  7. In diesem Fall ersetzen Sie die 2 durch eine 0 und tauschen die davon linke Stelle durch eine 1 aus.
  8. Zum endgültigen Verständnis können Sie die Zahlen 1010 und 1011 miteinander multiplizieren. Das Ergebnis soll 1101110 sein, wird aber vor dem Anwenden der letzten Regel 1021110 ergeben.

By Brathwaite

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