Mathematical Symbols
Symbols save time and space when writing. Here are the most common mathematical symbols:
| Symbol | Meaning | Example |
|---|---|---|
| + | add | 3+7 = 10 |
| − | subtract | 5−2 = 3 |
| × | multiply | 4×3 = 12 |
| ÷ | divide | 20÷5 = 4 |
| / | divide | 20/5 = 4 |
| ( ) | grouping symbols | 2(a−3) |
| [ ] | grouping symbols | 2[ a−3(b+c) ] |
| { } | set symbols | {1, 2, 3} |
| π | pi | A = πr2 |
| ∞ | infinity | ∞ is endless |
| = | equals | 1+1 = 2 |
| ≈ | approximately equal to | π ≈ 3.14 |
| ≠ | not equal to | π ≠ 2 |
| < | less than | 2 < 3 |
| ≤ | less than or equal to | x ≤ 5 |
| > | greater than | 5 > 1 |
| ≥ | greater than or equal to | y ≥ 10 |
| √ | square root ("radical") | √4 = 2 |
| ° | degrees | 20° |
| ∴ | therefore | x − 2 = 5 ∴ x = 7 |