Math Bits
Math Bits Notebook: Arithmetic of Complex Numbers (Add, Subtract, Multiply)
Comprehensive resource offers an explanation of the rules for adding, subtracting, and multiplying complex numbers with examples of each.
Math Bits
Math Bits Notebook: Polynomials: Add & Subtract
Features examples of how to add and subtract polynomials using various methods. These include the horizontal method, the vertical method, and algebra tiles.