The term "2x10" typically refers to a dimensional lumber size, specifically a piece of wood that is 2 inches thick and 10 inches wide. This size is commonly used in construction for framing, flooring, and other structural applications. The actual dimensions may be slightly smaller due to the milling process, often measuring 1.5 inches by 9.25 inches. In addition to its use in construction, "2x10" can also refer to a mathematical expression representing the multiplication of 2 by 10, which equals 20. This basic arithmetic operation is foundational in mathematics and is often taught in early education settings, helping students develop their calculation skills.