Shirabe
暗算
Noun Irregular Transitive
Español jmdict
1
noun (common) (futsuumeishi)noun or participle which takes the aux. verb surutransitive verb calcular de memoria;calcular mentalmente;aritmética mental
English jmdict
1
noun (common) (futsuumeishi)noun or participle which takes the aux. verb surutransitive verb mental arithmetic
He doesn't have enough brains to do sums in his head.