Place Value: Subtraction

Autor:Austen Meek

First subtract the two numbers by regrouping; borrow if necessary--don't use the standard algorithm. Check you answer. Relate the process of regrouping to the steps in the standard algorithm.

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Some random function
Trefoil Knot
Untitled

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To explore the location of circumcentre and circumcircle.
Quadrilateral-Basic Notions
Adding fractions with the area model

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