How many cards are there from 8 to 18?
1 1 card, from 8 to 18-* *1card, because from 8 to18, * * counts as 1 1 card. Mathematics, abbreviated as maths (British English) or Math (American English), is a subject that studies the concepts of quantity, structure, change, space and information, and belongs to a formal science from a certain point of view.