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Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Subtraction 3: Borrowing or Regrouping
A video covering a review of subtraction using a number line, followed by subtraction of numbers up to three-digits by using borrowing and regrouping. Practice problems available. [18:26]
Khan Academy
Khan Academy: Subtraction: Introduction to Borrowing or Regrouping
A video covering a review of subtraction using a number line, followed by subtraction of numbers up to three-digits by using borrowing and regrouping.