Unit 2 Signs of Omission
Omissions in math context can be shown in print as a blank space, a line, ellipsis, question mark, or an empty space. In Nemeth Code, omissions are most often represented by the following three symbols (shapes are taught in Unit 14).
| General sign of omission (full cell) | ⠿ |
| Blank line (long dash) | ⠤⠤⠤⠤ |
| Ellipsis | ⠄⠄⠄ |
General Sign of Omission
A full cell is used as a general sign of omission when an omission is shown by a blank space or a question mark. It takes the place of whatever is omitted. Spacing and placement are determined by the specific type of symbol being omitted. If a sign of operation is omitted, spacing rules for signs of operation must be followed. If a sign of comparison is omitted, spacing rules for signs of comparison must be followed.
Examples:
6x? = 24
⠼⠖⠈⠡⠿⠀⠨⠅⠀⠼⠆⠲
45÷9 = ?
⠼⠲⠢⠨⠌⠔⠀⠨⠅⠀⠿
32 < 6?6
⠼⠒⠆⠀⠐⠅⠀⠼⠖⠿⠖
Blank Line and Ellipsis
A blank line (or long dash) is created by 4 consecutive hyphens and is often used for fill-in-the-blank or entering answers. An ellipsis indicates that something has been omitted.
To avoid misreading the ellipsis or the long dash as another math symbol, they are preceded and followed by a space. Exception: No space is left between a long dash or an ellipsis and its related punctuation mark.
Examples:
9+____ = 87
⠼⠔⠬⠀⠤⠤⠤⠤⠀⠨⠅⠀⠼⠦⠶
5 ____ 7
⠼⠢⠀⠤⠤⠤⠤⠀⠼⠶
____ ÷ 3 = 8
⠤⠤⠤⠤⠀⠨⠌⠒⠀⠨⠅⠀⠼⠦
No space is left between a long dash or an ellipsis and its related punctuation mark.
21, 22, ____, 24, 25
⠼⠆⠂⠠⠀⠼⠆⠆⠠⠀⠤⠤⠤⠤⠠⠀⠼⠆⠲⠠⠀⠼⠆⠢
5, 10, 15, …, 100
⠼⠢⠠⠀⠼⠂⠴⠠⠀⠼⠂⠢⠠⠀⠄⠄⠄⠠⠀⠼⠂⠴⠴
Spacing Exception: A long dash or an ellipsis may be used unspaced from a related comma, decimal point, prime sign, dollar sign, cent sign, or percent sign.
150¢ = $____
⠼⠂⠢⠴⠈⠉⠀⠨⠅⠀⠈⠎⠤⠤⠤⠤
100÷2 = …%
⠼⠂⠴⠴⠨⠌⠆⠀⠨⠅⠀⠄⠄⠄⠈⠴
2.5 - 0.3 = 2.____
⠼⠆⠨⠢⠤⠴⠨⠒⠀⠨⠅⠀⠼⠆⠨⠤⠤⠤⠤
1′ = ____″
⠼⠂⠄⠀⠨⠅⠀⠤⠤⠤⠤⠄⠄⠻⠃⠗