# Signs and Symbols

+ | addition, plus, positive |

- | subtraction, minus, negative |

*a*x*b**a**b**a*·*b*
a * b | a times b, multiplication |

*a*÷*b**a**b*^{-1}
a / b | a divided by b, division |

= | equal to |

approximately equal to | |

a ~ b | a is similar to b, of the order of |

congruent to | |

not equal to | |

identical to | |

a < b | a is less than b |

a > b | a is greater than b |

a b | a is less than or equal to b |

a b | a is greater than or equal to b |

a b | a is proportional to b |

% | percent |

: | ratio of |

*x^n**x**n*
x ^{n} | x to the power of n |

infinity | |

perpendicular to | |

|| | parallel to |

**Subjects: ** Chemistry Mathematics Physics