Editing Signed-digit representation (section)

===Indo-Aryan languages===
The oral and written forms of numbers in the [[Indo-Aryan languages]] use a negative numeral (e.g., "un" in [[Hindi]] and [[Bengali language|Bengali]], "un" or "unna" in [[Punjabi_Language|Punjabi]], "ekon" in [[Marathi_Language|Marathi]]) for the numbers between 11 and 90 that end with a nine. The numbers followed by their names are shown for Punjabi below (the prefix "ik" means "one"):<ref>[http://quizlet.com/16314536/punjabi-numbers-1-100-flash-cards/ Punjabi numbers] from [[Quizlet]]</ref> 
* 19 unni, 20 vih, 21 ikki
* 29 unatti, 30 tih, 31 ikatti
* 39 untali, 40 chali, 41 iktali
* 49 unanja, 50 panjah, 51 ikvanja
* 59 unahat, 60 sath, 61 ikahat
* 69 unattar, 70 sattar, 71 ikhattar
* 79 unasi, 80 assi, 81 ikiasi
* 89 unanve, 90 nabbe, 91 ikinnaven.

Similarly, the [[Sesotho]] language utilizes negative numerals to form 8's and 9's.
* 8 robeli (/Ro-bay-dee/)  meaning "break two" i.e. two fingers down
* 9 robong (/Ro-bong/) meaning "break one" i.e. one finger down