Formative Assessment 137

Assessment Problem: 

If m is a positive number, which of these is equivalent to (the same as) m + m + m + m?
a) 4m     b) m4     c) 4(m + 1)     d) m + 4

Mathematical Issues: 

This task assesses students' conceptual understanding of the variable and how to simplify it.

Domain: 
Algebraic Relations
Theme: 
Equations
Common Core Standards: 
7.EE.2
Research References: 
Rittle-Johnson, B., & Star, J. R. (2007).