If a represents the number of oranges in Column I and b represents the number oranges in Column II, and a and b are integers, then the sum a + b is also an integer. In symbols, if a, b e Z then a + b e Z. Questions: What operation is used in the illustration? b. What can you say about the addends? What about their sum? applicable? Give an example to prove your answer. Use integers. What if the operation is multiplication, will the same property be and are integers, then integers has a sum or product which is also an integer. We say that the set of The above illustration shows Closure Property. It states that each pair of integers is closed under addition and multiplication. Examples: 1. If 13 and 28 F 7 then (1338) 11 C. a. If X________ or is also an integer.