Symbols se 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, less than or equal to 2 < 3 > ≥ greater than, greater than or equal to 5 > 1 √ square root ("radical") √4 = 2 ° degrees 20° ∴ therefore a=b ∴ b=aSymbols in Geometry Symbols in Algebra