\input zb-basic \input zb-matheduc \iteman{ZMATH 2001f.04954} \itemau{Wakeley, Ann; Rivera, Susan; Langer, Jonas} \itemti{Not Proved: Reply to Wynn.} \itemso{Child Dev. 71, No. 6, 1537-39 (2000).} \itemab Asserts that findings on whether young infants look longer at incorrect addition and subtraction have been inconsistent or negative. Hypothesizes that imprecise ordinal calculating with very small numbers of objects develops in late infancy and that precise calculating develops in early childhood. (ERIC) \itemrv{~} \itemcc{F31} \itemut{infant behavior; infants; mathematical skills; reaction time} \itemli{doi:10.1111/1467-8624.00246} \end