It does not mean anything.
zero property of addition
Addition property is _ The sum of any number and zero is that number
any number plus 0 equals the previously said number 20+0=20 demonstrates the zero property
"Dose" is a measured portion of a medicine. So dose zero must refer to a placebo. Or if you are asking what is the zero property of addition: The zero property of addition states that adding zero to any number will not change the number. Thus: x + 0 = x
zero property of addition! =D
Any number plus zero is that number.
The Zero Property of Addition
Identity Property of Addition
Adding zero to any number exemplifies the identity property of addition. For example, 12 + 0 = 12 where adding zero does not change the sum.
When you add zero to any quantity, the sum is the original quantity.
The relevant properties are the commutative property, the associative property, and the property of zero (i.e., if you add zero to a number you get the same number again).