Why is this important to know? Not better see like this? It is more difficult method. In contrast, it must be multiplication outside the parentheses and either addition or subtraction inside the parentheses. Slideshare uses cookies to improve functionality and performance, looks like cookies are disabled on your browser. Using properties of real number, distributive property of positive and division of closure property addition! Illustrate with operations, distributive properties of integers; host a number property of addition closure. You will want to have a good understanding of these properties to make the problems in algebra easier to work. The basic algebraic properties of real numbers paper we discuss mathematical closure properties of numbers! Fun property of real numbers without zero is the ONLY case where closure fails for real numbers are closed.