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Student's math homework answer on a Common Core problem, showing a correct calculation and an estimation note from the teacher.

A Facebook post by Larisa Yaghoobov Settembro featuring a child's math homework problem about Carole reading pages, with handwritten answers and corrections, including a student's calculation and a teacher's note to "Estimate 100 - 30 = 70."

A Facebook post by Larisa Yaghoobov Settembro featuring a child's math homework problem about Carole reading pages, with handwritten answers and corrections, including a student's calculation and a teacher's note to "Estimate 100 - 30 = 70."

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