4.1 Addition and Subtraction
Adding variables isn’t difficult. Here below you see a quadrangle with different length for each side.
Example А:
The expression for the quadrangles perimeter is written as:
Perimeter: 5*f* + 4*f* + 3*f* + 2*f* = 14*f*
Example B:
If we are to express the perimeter for the figure above then it will look like this:
Perimeter = 3*g* + 2*j* + 2*g* + 3 = 5*g* + 2*j* + 3
We add the similar terms with each other. So, we cannot add 5*g* with 2*j*, because these have different variables which can have different variables. |