Basic Math Symbols

Symbol | Symbol Name | Meaning/Definition | Example |
---|---|---|---|

= | equals sign | equality | 5 = 2+3 |

≠ | not equal sign | inequality | 5 ≠ 4 |

> | strict inequality | greater than | 5 > 4 |

< | strict inequality | less than | 4 < 5 |

≥ | inequality | greater than or equal to | 5 ≥ 4 |

≤ | inequality | less than or equal to | 4 ≤ 5 |

( ) | parentheses | calculate expression inside first | 2 × (3+5) = 16 |

[ ] | brackets | calculate expression inside first | [(1+2)*(1+5)] = 18 |

+ | plus sign | addition | 1 + 1 = 2 |

- | minus sign | subtraction | 2 − 1 = 1 |

± | plus - minus | both plus and minus operations | 3 ± 5 = 8 and -2 |

∓ | minus - plus | both minus and plus operations | 3 ∓ 5 = -2 and 8 |

* | asterisk | multiplication | 2 * 3 = 6 |

× | times sign | multiplication | 2 × 3 = 6 |

∙ | multiplication dot | multiplication | 2 ∙ 3 = 6 |

÷ | division sign / obelus | division | 6 ÷ 2 = 3 |

/ | division slash | division | 6 / 2 = 3 |

mod | modulo | remainder calculation | 7 mod 2 = 1 |

. | period | decimal point, decimal separator | 2.56 = 2+56/100 |

a^b | caret | exponent | 2 ^ 3 = 8 |

√a | square root | √a - √a = a | √9 = ±3 |

3√a | cube root | 3√a - 3√a - 3√a = a | 3√8 = 2 |

4√a | fourth root | 4√ a< - 4√ a - 4√ a - 4√ a = a | 4√ 16 = ±32 |

n√ a< | n-th root (radical) | for n=3, n√ 8 = 2 | |

% | percent | 1% = 1/100 | 10% × 30 = 3 |

‰ | per-mille | 1‰ = 1/1000 = 0.1% | 10‰ × 30 = 0.3 |

ppm | per-million | 1ppm = 1/1000000 | 10ppm × 30 = 0.0003 |

ppb | per-billion | 1ppb = 1/1000000000 | 10ppb × 30 = 3×10^-7 |

ppt | per-trillion | 1ppt = 10^-12 | 10ppt × 30 = 3×10^-10 |

page revision: 0, last edited: 20 Jul 2016 21:20