Addition and subtraction algorithm  summary sheet
Question  4739= 8 
70  23 = 
638 + 476 
What did the student do?

Got the "right" answer 8... 40  30, 97, 102 = 8 
Believes 53 she got using her algorithm is correct. 
600+400=Ten 100 
What can be inferred about what the student knows because of what the student did?


Where in your sequence might the student's understanding be among the list of understandings in that sequence? What evidence can you give to support that placement?


What activities, from the book, could be used to build on these student's understanding and move them toward mathematical literacy?

Review the ideas from the Constance Kamii videos for addition and subtraction and describe what you learned about transitioning from single digit addition and subtraction to more advanced additiona and subtraction algorithms to include the traditional algorithms.