Concepts associated with the equality symbol

摘要: This paper looks at recent research dealing with uses of the equal sign and underlying notions equivalence or non-equivalence among preschoolers (their intuitive nitions equality), elementary secondary school children, college students. The idea that is a “do something signal” expression was first coined by Behr, Erlwanger Nichols in their 1976 PMDC Technical Report (S. Erlwanger, personal communication, June 1980). (an operator symbol) persists throughout even into junior high school. High schoolers' use algebraic equations as symbol for may be concealing fairly tenuous grasp relationship between notion equivalence, indicated some “shortcut” errors they make when solving equations.