1×8

1×8 is a notation that can refer to several related concepts, depending on context. In mathematics, it denotes the product of the numbers 1 and 8, which equals 8. This simple expression illustrates the multiplicative identity property, since any number multiplied by 1 remains unchanged.

The expression is also a basic example of commutativity in arithmetic: 1×8 = 8×1. This holds across standard number systems such as integers, rationals, reals, and complex numbers. In practical terms, 1×n equals n for any n, a convenient simplification in algebra, programming, and problem solving.

In measurement and construction, 1×8 is a common nominal size used for boards and timbers. A “1×8” board is not actually 1 inch by 8 inches; after planing and drying, its cross-section is typically about 3/4 inch by 7 1/4 inches in the United States. These boards are often used for trim, shelving, and light framing. Availability and exact dimensions vary by wood species, grade, and regional standards.

In data representation, 1×8 can describe the dimensions of a matrix or array: one row and eight columns, containing eight elements. The transpose of a 1×8 array is an 8×1 array.

Overall, 1×8 is a versatile notation that appears in math, measurement, and data contexts, with the core idea involving a single unit scaled across a line of eight units or a single row of eight elements.