




Massachusetts Comprehensive Assessment System
2014, Grade 5 Mathematics
Question 10: OpenResponse 

Reporting Category: Operations and Algebraic Thinking Standard: Mathematics.5.OA.1.01  Use parentheses, brackets, or braces in numerical expressions, and evaluate expressions with these symbols. 
Molly buys 2 packs of 10 baseball cards every week. She gives her little brother 3 cards from each pack and saves the rest. The expression below shows how many cards Molly will save after 5 weeks.  What is the total number of baseball cards Molly will save after 5 weeks? Show or explain how you got your answer.
Hugo buys 15 stickers every week for 10 weeks. Each week he uses 6 stickers and saves the rest. Write an expression to show the total number of stickers Hugo will save after 10 weeks.
Kaitlin buys 20 stickers every week for 10 weeks. Each week she uses 5 stickers and saves the rest. What is the total number of stickers Hugo and Kaitlin will save after 10 weeks? Show or explain how you got your answer.

Scoring Guide and Sample Student Work Select a score point in the table below to view the sample student response.
Score  Description 
4 
The student response demonstrates an exemplary understanding of the Operations and Algebraic Thinking concepts involved in using parentheses, brackets, or braces in numerical expressions, and evaluating expressions with these symbols. The student evaluates a given expression and writes an expression for a given situation. 
4 
3 
The student response demonstrates a good understanding of the Operations and Algebraic Thinking concepts involved in using parentheses, brackets, or braces in numerical expressions, and evaluating expressions with these symbols. Although there is significant evidence that the student was able to recognize and apply the concepts involved, some aspect of the response is flawed. As a result the response merits 3 points. 
2 
The student response demonstrates a fair understanding of the Operations and Algebraic Thinking concepts involved in using parentheses, brackets, or braces in numerical expressions, and evaluating expressions with these symbols. While some aspects of the task are completed correctly, others are not. The mixed evidence provided by the student merits 2 points. 
1 
The student response demonstrates a minimal understanding of the Operations and Algebraic Thinking concepts involved in using parentheses, brackets, or braces in numerical expressions, and evaluating expressions with these symbols. 
0 
The student response contains insufficient evidence of an understanding of the Operations and Algebraic Thinking concepts involved in using parentheses, brackets, or braces in numerical expressions, and evaluating expressions with these symbols to merit any points. 
Note: There are 2 sample student responses for Score Point 4.
Grade 5 Mathematics
 Question 10: Operations and Algebraic Thinking
 Question 21: Number and Operations in Base Ten
Return to the MCAS 2014 Student Work Directory
Last Updated: October 5, 2014


