Cause if you add the colors together you get another color. Red+Blue=Purple
addition
it is called sum
…They're called terms, and an addition sentence is called a summation, or just sum for short.
Numbers added together in addition are called addends.
sum
Because it is.
Because the combination of some colors produce the "white" light (color).
Well I'm not sure about the color addition part, I have that same questin, but mixing pigments is called color subtraction because more color is absorbed and taken away then reflected and transmitted.
Color addition of the colors Red, Green and Blue.
The answer to an addition problem is called the sum.
The newest addition to this test is the addition of color. Adding color to the image shows the direction and rate of blood flow more clearly.
addition
The Greeks called it kyronos, which is synonomous with bronze. in addition, Homer, writer of the illiad, called it "shining like a bronze shield."
The result of an addition problem is called the sum.
it is called sum
…They're called terms, and an addition sentence is called a summation, or just sum for short.
It is called an addend