Where does this definition of mental arithmetic come from?
This entry for mental arithmetic is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Is mental arithmetic a noun, verb, or something else?
In this entry, mental arithmetic is tagged as noun.
Does mental arithmetic appear elsewhere on Lughet?
Yes — mental arithmetic appears under other sources or language pairs in Lughet's collection. See the list below.
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.