Base Code 15 : Dots 2 and 6
Division ( / )
In division, the signs (/) and (÷) are normally used. For indicating /, dots 3 and 4 are
used. Please see that the visual sign resembles the Braille sign too. In literal meaning,
multiplication is considered as the opposite of division and in mathematical codes too, the
visual presentation for multiplication (dots 1 and 6) and division (dots 3 and 4) look
opposite ones. This logic may be applied wherever possible. For example, dots 4 and 5
indicate superscript since they come on the upper portion of the Braille cell whereas the
subscript which is considered to be the opposite of the superscript appears on the lower side
of the Braille cell represented by dots 5 and 6. For union in set language, the symbol
“reverse u” is used whereas for intersection, the opposite of this symbol - dots 1,4,and 6 are
used. Therefore, the ‘opposite’ logic is applied in most of the cases and applying this logic
will help the learner to learn mathematical codes by not memorising but through systematic
application of logic.
Though the symbol (/) is used in normal division, (÷) is also used as a specific sign for
division. In order to distinguish this sign from the (/) sign, the Braille symbol for this is
written as dots 4 and 6 followed by dots 3 and 4 in the second cell. As dots 4 and 6
indicate the punctuation indicator, addition of this before the division symbol indicates
the division sign (÷) The examples using these signs are as follows:
(^8) ÷ 3=
4x / 2 =
(^529) ÷ 7=
Base Code 16 : Dots 1, 2, and 6
Directly over and inner radical sign
The arrows are written in four forms, viz.,
← - arrow indicating left side ↑ - arrow indicating up
→ - arrow indicating right side ↓ - arrow indicating down
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