Mr. Walker asked his students to use the associative property to find an expression that is equivalent to (13+15+20) + (20+47+18). The expressions that four students created are shown in the table below.
Student
Jeremy
Layla
Expressions Generated by Students
Expression
(20+13+15)+(20+47+18)
(20+47+18)+(13+15+20)
(13+ 20)+(20+47+18)+ 15
(13+15+20+20) + (47+18)
Keith
Melinda
How many of the students correctly applied only the associative property to rewrite the expression?
one
two
three
four