Approximation symbol

Approximation symbol is (≈).
An approximation is anything that is similar, but not exactly equal, to something else. 
A number can be approximated by rounding. A calculation can be approximated by rounding the values within it before performing the operations.
You can use the Approximation symbol by using this symbol ≈.
Symbol approximately: (≈) .
Approximately equal symbol: (≈) .
Approximately symbol: (≈).

Equal symbol

Equal definition: Exactly the same amount or value. 
Equal symbol is (=).
5+5 = 10.
Doesn't Equal symbol is (≠).
5+1 ≠ 8.

Difference between approximation symbol and equal symbol

Approximation symbol is anything that is similar, but not exactly equal (≈).
Equal symbol: Exactly the same amount or value (=).

Mathematical symbols

Here is the list of mathematical symbols:
Multiplication: (x) example 5x5 = 25, or you can use (*) 5*5 = 25.
Division: (/) or (÷) example 1/1=1, 1÷1=1.
Less than: (<) example 3<5.
greater than: (>) example 5>3.
Minus: (-) example 2-1=1.
plus: (+) example 2+2=4.
Equal symbol: (=).
Approximately symbol: (≈).