Question

Antonio read 1/2 of the pages in a chapter in his book.If he read 9 pages,how many pages are in the chapter??

Answer 1

9 is 1/2 of the chapter, find the whole. 

9 + 9 = 18
1/2 + 1/2 = 1

18 is the number of pages in the chapter 

Answer 2

1/2 = 9 then 1 = 18. The answer is 18.