Number Cards


These cards can be printed out and used to help teach these various number systems. By printing out all of these cards, the positions of the different number systems can be compared to see why converting between binary and decimal is 'hard' while converting between binary and octal/hexadecimal is easy.

There are two versions for each document: one without printed borders and another with printed borders. The versions without borders are intended to be printed on PlainCards perforated cardstock and then punched out along the perforations to make the cards. The versions with borders can be printed on regular paper and cut out using scissors.

The original template used to create these cards is also available.



Binary Cards
(without border: PDF, SVG; with border: PDF, SVG)
Eight binary position cards with positions for: 1, 2, 4, 8, 16, 32, 64 and 128.

Octal and Decimal Cards
(without border: PDF, SVG; with border: PDF, SVG)
Three octal position cards (1, 8, 64) and three decimal position cards (1, 10, 100) for a total of 6 cards.
There are 2 unused (blank) cards.

Hexadecimal Cards
(without border: PDF, SVG; with border: PDF, SVG)
Three hexadecimal position cards (1, 16, 256) and one binary position card (for position 256) for a total of 4 different cards.
This set of 4 cards is repeated twice so that all eight cards are used.


These documents were created by Gary Kacmarcik.

These documents are licensed under a Creative Commons License Creative Commons Attribution-Share Alike 3.0 Unported License