This task is a problem created for third graders on the use of the subtraction algorithm with multi-digit numbers. An example of a student’s work is given on solving a multi-digit subtraction problem, where they forget to borrow from the tens place. The questions in this task are scaffolded with argumentative language to require a critique to the question, a claim, evidence, and warrants.

Microsoft Word version: 3_OA_SubtractionMultiDigitAlgorithm_Problem_Critique_1

PDF version: 3_OA_SubtractionMultiDigitAlgorithm_Problem_Critique_1