The study of numbers, equations, functions, and geometric shapes (see geometry) and their relationships.
Sentence translation: Three plus three equals six. Bye!
This five-year-old ASL-speaking bilingual kid learned addition math.
At this stage of language acquisition, her palm orientation for the numbers 1-5 faces out. Also, the palm orientation of PLUS is the opposite. I chose not to correct them until she is in grade schools to learn academic ASL later.