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By: Monica Neagoy & Jennifer Bay-Williams

In: Planting the Seeds of Algebra, PreK-2: Explorations for the Early Grades

Part : Exploration IV. Odd and Even Numbers: Beyond the Last-Digit Rule

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Exploration IV. Odd and Even Numbers: Beyond the Last-Digit Rule
Exploration IV. odd and even numbers: beyond the last-digit rule

I do not suggest avoiding the last digit rule, this would be impossible, but rather postponing it in order to achieve odd/even classification by essence and not by superficial features of the common representation [of numbers].

Rina Zazkis (2011)

Photo by Susan K Hamon

Rationale for Exploration IV
  • The concept of odd and even numbers holds a position of prominence in preK-2 mathematics.
  • Students and teachers need to explore more profound meanings of odd and even and representations of odd and even numbers. The algebra of odd and even numbers serves students now, in middle school, in high school, and in college.
  • Just as in many languages the word for “odd” ...

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