Workplace mathematics, a subgroup of research on everyday mathematics and ethnomathematics documents the mathematical activities of both adults and children outside school settings. In this paper, I document the mental mathematical activities of a group of bus conductors in Chennai, India. I draw into the research areas of mental computation and…

Studies on cognition have capitalized on the role of contexts and experience in shaping our cognitive competence. In the past few decades, the mathematical education research field has begun to pay increased attention to the mathematics practices of both adults and children that take place in non-academic settings. As a result, theoretical fields…

Researchers who have carried out studies pertaining to mental computation and everyday mathematics point out that adults and children reason intuitively based upon experiences within specific contexts; they use invented strategies of their own to solve real-life problems. We draw upon research areas of mental computation and everyday mathematics…