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Early Steps Count: Teaching Arithmetic to Prepare Students for Algebra

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Slide 7 of 19

Knowledge Packet: Subtraction with Regrouping

This is a graphical display of a Chinese Knowledge Packet. It shows all of the concepts and procedures Chinese teachers think about when planning for Subtraction of 2-digit numbers. It shows the concepts and their relationship to each other. The center column, which lists the core concepts is comprised of "Subtraction of large Numbers with Regrouping," which rests on "Subtraction of Two-Digit Numbers with Regrouping," which rests on "Subtraction of Two-Digit Numbers without Regrouping," which rests on "Subtraction within 20," which rests on "Subtraction within 10." Outside this central core are related concepts such as "Understanding of Place Value."

Knowing and Teaching; Ma, Liping; cc 1990;
Lawrence Erlbaum Ass. Inc.; pg. 19.