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Document type:
Zeitschriftenaufsatz 
Author(s):
Obersteiner, A.; Reiss, K.; Ufer, S. 
Title:
How training on exact or approximate mental representations of number can enhance first-grade students' basic number processing and arithmetic skills 
Journal title:
Learning and Instruction 
Year:
2013 
Journal volume:
23 
Pages contribution:
125–135