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Acquisition of elementary arithmetical operations in children with impaired intellectual development / Usvojenost elementarnih računskih operacija kod dece ometene u intelektualnom razvoju
(Pedagoško društvo Srbije, Beograd i Univerzitet u Beogradu - Filozofski fakultet - Institut za pedagogiju i andragogiju, Beograd, 2009)
The aim of our research was to determine the levels of acquisition of elementary arithmetical operations of addition and subtraction among children with impaired intellectual development and the correlation between spatial ...