Symbol
|
Symbol Name
|
Meaning /
definition
|
Example
|
=
|
equality
|
7 = 5+2
7 is equal to 5+2 |
|
≠
|
not equal sign
|
inequality
|
1 ≠ 2
1 is not equal to 2 |
≈
|
approximately equal
|
approximation
|
sin(0.01) ≈ 0.01,
x ≈ y means x is approximately equal to y |
>
|
strict inequality
|
greater than
|
5 > 4
5 is greater than 4 |
<
|
strict inequality
|
less than
|
4 < 5
4 is less than 5 |
≥
|
inequality
|
greater than or equal to
|
5 ≥ 4,
x ≥ y means x is greater than or equal to y |
≤
|
inequality
|
less than or equal to
|
4 ≤ 5,
x ≤ y means x is less than or equal to y |
( )
|
parentheses
|
calculate expression inside first
|
2 × (3+5) = 16
|
[ ]
|
brackets
|
calculate expression inside first
|
[(1+2)×(1+5)] = 18
|
+
|
addition
|
1 + 1 = 2
|
|
−
|
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
|
*
|
multiplication
|
2 * 3 = 6
|
|
×
|
multiplication
|
2 × 3 = 6
|
|
⋅
|
multiplication
|
2 ⋅ 3 = 6
|
|
÷
|
division
|
6 ÷ 2 = 3
|
|
/
|
division
|
6 / 2 = 3
|
|
—
|
division / fraction
|
||
mod
|
modulo
|
remainder calculation
|
7 mod 2 = 1
|
.
|
period
|
decimal point, decimal separator
|
2.56 = 2+56/100
|
ab
|
power
|
exponent
|
23 = 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
|
|
%
|
1% = 1/100
|
10% × 30 = 3
|
|
‰
|
1‰ = 1/1000 = 0.1%
|
10‰ × 30 = 0.3
|
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