Unit 7 of the first volume of mathematics in senior one need not calculate the ancients. According to relevant data, the main content of ancient counting in Unit 7 of Mathematics in the first volume of Senior One is to let students recognize, read, write and dial the number 1 1 ~ 20 with wooden sticks and counters, master the order and size of numbers within 20, get a preliminary understanding of decimal digits and units, understand decimal system, and know11. Mathematics comes from μ in ancient Greece? θ η μ α, often abbreviated as math or maths], is a subject that studies concepts such as quantity, structure, change, space and information.