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"A cognitive tool for teaching the addition/subtraction of common ..."
Siu Cheung Kong, Lam For Kwok (2005)
- Siu Cheung Kong

, Lam For Kwok
:
A cognitive tool for teaching the addition/subtraction of common fractions: a model of affordances. Comput. Educ. 45(2): 245-265 (2005)

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