The mathematics of numbers (integers, rational numbers, real numbers, or complex numbers) under the operations of addition, subtraction, multiplication, and division.
Of a progression, mean, etc, computed solely using addition.
Of, relating to, or using arithmetic; arithmetical.
A person's ability to count, calculate, and use different systems of mathematics at differing levels.
An abstract representational system studying numbers, shapes, structures, quantitative change and relationships between them.