scholarly journals A Comparative Analysis of the Addition and Subtraction of Fractions in Textbooks from Three Countries

2010 ◽  
Vol 12 (2) ◽  
pp. 117-151 ◽  
Author(s):  
Charalambos Y. Charalambous ◽  
Seán Delaney ◽  
Hui-Yu Hsu ◽  
Vilma Mesa
2007 ◽  
Vol 177 (4S) ◽  
pp. 398-398
Author(s):  
Luis H. Braga ◽  
Joao L. Pippi Salle ◽  
Sumit Dave ◽  
Sean Skeldon ◽  
Armando J. Lorenzo ◽  
...  
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