# Unit 4 Signs of Operation and Comparison

The following signs are made using two cells. The first cell is called a prefix (a prefix is generally made from a combination of dots 4, 5, and 6 since they are not used as letters).

These signs of operation and comparison are used with numbers just as they are written in print.

## Signs of Operation

These signs of operation are formed using the dot 5 prefix and no space is left between the sign of operation and the numbers.

Plus (+) | ⠐⠖ |

Minus (-) | ⠐⠤ |

Multiplication (x) | ⠐⠦ |

Multiplication dot (∙) | ⠐⠲ |

Divided by (÷) | ⠐⠌ |

## Examples:

5**+**6

⠼⠑**⠐⠖**⠼⠋

10-2

⠼⠁⠚**⠐⠤**⠼⠃

100**x**52

⠼⠁⠚⠚**⠐⠦**⠼⠑⠃

7**∙**8

⠀⠼⠛**⠐⠲**⠼⠓

25**÷**5

⠼⠃⠑**⠐⠌**⠼⠑

## Signs of Comparison

These signs of comparison are formed using either the dot 4 prefix (for < and >) or the dot 5 prefix (for =) and unlike the previous signs of operation, a blank space is left before and after the 2-cell symbol.

Equals (=) | ⠐⠶ |

Less than (<) | ⠈⠣ |

Greater than (>) | ⠈⠜ |

**Examples:**

9**=**5+4

⠼⠊⠀⠐⠶⠀⠼⠑⠐⠖⠼⠙

24∙8**=**

⠼⠃⠙⠐⠲⠼⠓⠀**⠐⠶**

33÷3**=**11

⠼⠉⠉⠐⠌⠼⠉⠀**⠐⠶**⠀⠼⠁⠁

true or false 6x6**<**38

⠞⠗⠥⠑⠀⠕⠗⠀⠋⠁⠇⠎⠑⠀⠼⠋⠐⠦⠼⠋⠀**⠈⠣**⠀⠼⠉⠓

a+3**>**7

⠁⠐⠖⠼⠉⠀**⠈⠜**⠀⠼⠛

## Tally Marks

Tally Mark ( ||||| ) | ⠸ |

Strikethrough | ⠒ |

A tally mark is represented by a vertical line (dots 4-5-6). Groups of tally marks are represented by 5 tally marks followed by a space, but can also be represented as 4 tally marks followed by a strikethrough (dots 2-5) and then a space forming a "five-bar gate".

## Examples:

||||| |||

⠸⠸⠸⠸⠸⠀⠸⠸⠸

~~||||~~ ~~||||~~ ||

**⠸⠸⠸⠸⠒⠀⠸⠸⠸⠸⠒⠀⠸⠸**