Renato F.L. Azevedo, Daniel G. Morrow, in Aging, Technology and Health, 2018 The role of numeracy skills in EHR portal use. Numeracy, the "ability to understand and use numbers in daily life" (Rothman et al., 2008), complements the concept of literacy, and is sometimes also called "mathematical literacy".At its core, numeracy refers to one's ability to represent, store, and ....