https://sibi.upn.mx/cgi-bin/koha/opac-search.pl?q=ccl=%28su%3A%22C%C3%A1lculo%20aritm%C3%A9tico%22%29&sort_by=title_az&format=rss 2 0 50 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=200321 By Ávalos Esparza, Olivia | Solares Pineda, Diana Violeta.

]]> Place hold on “Los ceros también valen”. Conocimientos de alumnos de sexto grado de primaria sobre el cero como elemento del sistema decimal

]]> https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=200321 ISBN: https://sibi.upn.mx/cgi-bin/koha/opac-detail.pl?biblionumber=173603 By Singer, Vivian.
Abingdon, Reino Unido .
183-192

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