Basic math symbols | |||
---|---|---|---|
Symbol | Symbol Name | Meaning / definition | Example |
= | equal 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 |
× | multiplication sign | multiplication | 2 × 3 = 6 |
∙ | multiplication dot | multiplication | 2 ∙ 3 = 6 |
÷ | division sign / obelus | division | 6 ÷ 2 = 3 |
/ | division slash | division | 6 / 2 = 3 |
– | horizontal line | division / fraction | |
mod | modulo | remainder calculation | 7 mod 2 = 1 |
. | period | decimal point, decimal separator | 2.56 = 2+56/100 |
a^{ b} | power | exponent | 2^{3 }= 8 |
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 = ±2 |
^{ n}√a | n-th root (radical) | for n=3, ^{n}√8 = 2 | |
% | per-cent | 1% = 1/100 | 10% × 30 = 3 |
‰ | per-mile | 1‰ = 1/1000 = 0.1% | 10‰ × 30 = 0.3 |
ppm | parts-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} |