This task was used with second graders to understand place value. Students are asked to critique Lydia’s Idea on writing a number in expanded form and explain their reasoning. Lydia’s Idea involves the hundreds, tens, and ones place values and the expanded number contains a 0 in the tens place.

Microsoft Word version: 2_NBT_PlaceValue_Problem_Critique_LydiasIdea

PDF version: 2_NBT_PlaceValue_Problem_Critique_LydiasIdea

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