About: mental arithmetic

Premodifier: mental
Head noun: arithmetic

Same concepts
http://dbpedia.org/resource/Mental_calculation

Broader concepts

label	provenance	confidence
thing of the past	isap:473018006	0.572528
memory	isap:253572182	0.476006
skill	isap:475549943	0.426806

Narrower concepts

label	provenance	confidence
student	isap:243029477	0.182192