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The addition of two-digit numbers: exploring carry versus no-carry problems
two-digit addition problems semantic elaboration carry and no-carry problems
2009/12/31
Participants orally solved two-digit addition problems that were visually presented. The problems either were carries (e.g., 39 + 48) or no-carries (e.g., 34 + 53). As predicted by the triple-code mod...
On the magnitude representations of two-digit numbers
magnitude comparison two-digit numbers mental number line holistic model decomposed processing
2009/12/31
In this review, we discuss how the magnitude of two-digit numbers is represented and argue that the magnitude of tens and units is represented separately at least in addition to an overall holistic ma...