-크기가 크고 작음을 알아보기
https://www.nise.go.kr/ebook/media/2018_kifse_book/viewer.html?bookId=01_01_01&unitId=4&linkChk=f21f478e56ce9a81762f5c7d4d13ff9859507d6624cd2398f1892f96430ae6a4