---
_id: '67074'
author:
- first_name: M
  full_name: Hattermann, M
  last_name: Hattermann
- first_name: R
  full_name: vom Hofe, R
  last_name: vom Hofe
- first_name: Harry
  full_name: Kullmann, Harry
  id: '77972'
  last_name: Kullmann
  orcid: 0000-0001-5488-5105
citation:
  ama: 'Hattermann M, vom Hofe R, Kullmann H. An innovative approach to negative numbers
    based on the data of the PALMA-Project. In: ; 2013.'
  apa: Hattermann, M., vom Hofe, R., &#38; Kullmann, H. (2013). <i>An innovative approach
    to negative numbers based on the data of the PALMA-Project</i>. 37th Conference
    of the International Group for the Psychology of Mathematics Edu-cation, Kiel.
  bibtex: '@inproceedings{Hattermann_vom Hofe_Kullmann_2013, title={An innovative
    approach to negative numbers based on the data of the PALMA-Project}, author={Hattermann,
    M and vom Hofe, R and Kullmann, Harry}, year={2013} }'
  chicago: Hattermann, M, R vom Hofe, and Harry Kullmann. “An innovative approach
    to negative numbers based on the data of the PALMA-Project,” 2013.
  ieee: M. Hattermann, R. vom Hofe, and H. Kullmann, “An innovative approach to negative
    numbers based on the data of the PALMA-Project,” presented at the 37th Conference
    of the International Group for the Psychology of Mathematics Edu-cation, Kiel,
    2013.
  mla: Hattermann, M., et al. <i>An innovative approach to negative numbers based
    on the data of the PALMA-Project</i>. 2013.
  short: 'M. Hattermann, R. vom Hofe, H. Kullmann, in: 2013.'
conference:
  end_date: 2013-07-30
  location: Kiel
  name: 37th Conference of the International Group for the Psychology of Mathematics
    Edu-cation
  start_date: 2013-07-30
date_created: 2026-09-09T10:36:01Z
date_updated: 2026-09-09T10:36:09Z
jel:
- I24
language:
- iso: ger
quality_controlled: '1'
status: public
title: An innovative approach to negative numbers based on the data of the PALMA-Project
type: conference
user_id: '105186'
year: '2013'
...