Definitions for "Number line"
A line with an origin (0) and a unit length that allows for each integer to be assigned a point in the line
(1) A line on which points correspond to numbers.
A line on which equidistant points correspond to numbers in order. Used as a frame of reference for counting and numeration activities.
a one-dimensional graph
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a means of telling the edition. Most common is that which occurs on the copyright page and reads "1234567890". The lowest number indicates the edition.
Indicates impression. Commonly found on the copyright page. Some books will have none, some publishers use alphabet letters or other signs rather than numbers.
a written or graphical continuum of numerals, either horizontal or vertical; helpful to some learners as a visual aid to counting on and back.